AWS

• My take on "How AWS needs to change"
• CloudTrail's horrible developer experience
• AWS management account starter pack
• CloudFormation's ZipFile still does not support ESM imports
• Fun fact: you can make an unsubscribable subscription to an SNS topic
• How to auto-disable leaked IAM credentials
• The slow evolution of AppSync RDS support
• How Cognito User Pools work
• How to use tagged templates in AppSync to send queries to RDS
• DynamoDB basic operations
• How to use CloudFront signed cookies to serve MPD or HLS videos
• How to remove a resource before creating it with the CDK
• The problems with implicit AWS resources
• Stable S3 signed URLs
• The effects of not maintaining consistency with DynamoDB
• How to securely generate and store IAM Secret Access Keys with Terraform
• How to return a static file with a CloudFront function
• How to use KMS keys with CloudFront signed URLs
• How to use CloudFront signed URLs
• CloudFront function to remove part of the request path
• Announcing: S3 and CloudFront Signed URLs first public release
• How to use the AWS Lambda streaming response type
• How to generate keys for CloudFront URL signing with Terraform
• Terraform module to generate secret values and store in SSM Parameter Store
• CloudFront function to support HTML5 History API
• How to provide information about the backend environment to frontend clients
• Let's build a simple MQTT echo on AWS IoT Core
• Announcing: Building GraphQL APIs with AWS AppSync book finished
• How to detect device connection and disconnection in AWS IoT Core
• How to serve files from an AppSync API using S3 signed URLs
• TLS certificates in IoT Core
• How to implement file uploads to an AppSync API
• Efficient multi-level pagination in GraphQL
• First experiences with the new AppSync Javascript resolver runtime
• How to use Topic Rules to react to MQTT messages in AWS IoT Core
• How to generate IoT Core certificates with Terraform
• Basic AWS IoT Core policy example and breakdown
• How to connect to AWS IoT Core with MQTT.js
• How to manage IoT Core resources with Terraform
• The basic building blocks of AWS IoT Core
• SNS to AppSync subscription
• Getting started with the AWS JS SDK v3 included in the Node runtime
• How to use AppSync enhanced subscription filtering
• How to use SSM Parameter Store for sensitive inputs in Terraform
• How to escape inputs in AppSync resolvers
• What is the identity in the AppSync resolver context
• How to invoke a mutation with AppSync's HTTP data source
• How to migrate to CloudFront Origin Access Control from Origin Access Identity
• How to interact with IoT Core shadows from AppSync
• How to read values from SSM Parameter Store and Secrets Manager with AppSync HTTP data source
• How to send notifications to SNS, SQS, and EventBridge from AppSync
• Modeling common GraphQL patterns in DynamoDB
• How to call API Gateway from AppSync with IAM authorization
• How to call a protected external API using AppSync HTTP data source
• Use the HTTP data source to interact with HTTP APIs directly from AppSync
• How to use RDS as a Data Source for AppSync
• Efficient filtering in DynamoDB
• The surprising properties of DynamoDB pagination
• How to run SQL scripts against the RDS Data API with Terraform
• How to remove the RDS master user password from the Terraform state
• How to set up Amazon RDS password rotation with Terraform
• How to add a custom domain to an AppSync API
• How to implement rate limiting for an AppSync API
• How to use Lambda authorization with AppSync
• How to configure Auth0 with AWS AppSync
• Real-time data with AppSync subscriptions
• Send notifications to a Telegram bot for events in an AWS account
• Error handling in AppSync
• Deploy a serverless Telegram bot to AWS using Terraform
• How to use ES6 modules and top-level await in AWS Lambda
• How to delay calling a Lambda function using Step Functions
• How to implement access control in a GraphQL API
• How to periodically call a Lambda function
• How to use Cognito with AppSync
• AppSync Cognito directives
• Pipeline resolvers in AppSync
• How to use DynamoDB with AppSync
• How to use Lambda resolvers with AppSync
• Anatomy of an AppSync resolver
• How to maintain database consistency in DynamoDB
• What are Resolvers in AppSync and how they work
• Foreign key constraints in DynamoDB
• AWS AppSync: Getting started
• What is AWS AppSync
• CloudFront cache problems and how to solve them
• How to configure CloudFront for the HTML5 history API
• How token revocation works in Cognito
• How to use the refresh token with Cognito
• How to secure the Cognito login flow with a state nonce and PKCE
• AWS security case study: Vulnerable roles
• How to add Cognito login to a website
• AWS security case study: Unprotected logs
• AWS security case study: Hardcoded credentials
• Lambda development toolbox: Set environment variables locally
• How authentication and authorization work in AWS
• Lambda development toolbox: CLI logs watcher
• Introducing: AWS IAM masterclass video course
• How to use CloudFront Functions to change the origin request path
• 9 tips for working with AWS IAM
• How to use CloudFront Trusted Key Groups parameter and the trusted_key_group Terraform resource
• AWS architecture icons in an npm package
• How serverless cold starts change best practices
• How to keep accurate counts in DynamoDB
• AWS JS SDK v3 first impressions
• How to fix the profile support in the AWS JS SDK v3
• How to use cfn-init to set up EC2 instances with CloudFormation
• EC2 VPC building blocks
• How to properly implement unique constraints in DynamoDB
• How to clear a DynamoDB table
• How to use DynamoDB batch write with retrying and exponential backoff
• My AWS wishlist
• Encryption options for S3 objects
• How to cache ssm.getParameter calls in a Lambda function
• How to handle timeouts in Lambda functions
• Use-cases for IAM roles
• How to use OpenAPI with API Gateway REST APIs
• AWS IAM deep dive: How roles work
• How to use OpenAPI to deploy an API Gateway HTTP API
• How to implement a Lambda backend based on OpenAPI
• Interactive API documentation using Swagger UI deployed with Terraform
• How to use a break-glass role for sensitive admin tasks
• IAM policy evaluation logic explained with examples
• AWS IAM deep dive: How the policy evaluation logic works
• AWS IAM deep dive: How IAM users and groups work
• Granularity levels in AWS IAM policies
• The AWS account administrator's guide to MFA
• How to manage IAM user passwords
• How to use a custom domain with CloudFront and Route53
• How to use a custom domain on CloudFront with Cloudflare-managed DNS
• AWS IAM deep dive: Identity-based, and Resource-based policies
• How to completely lock down an AWS account with a service control policy (SCP)
• The consequences of memory allocation size for a Lambda function
• Are S3 signed URLs secure?
• How to use the aws_apigatewayv2_api to add an HTTP API to a Lambda function
• Avoid excessive costs and save money with S3 storage classes
• Easily run CLI commands as an AWS role with AWSudo
• Comparing async Javascript functions and callbacks on AWS Lambda
• Automatically schedule emails on MailChimp with RSS and AWS Lambda
• How to manage Lambda log groups with Terraform
• How to solve CORS problems when redirecting to S3 signed URLs
• How to deploy a single-page application with Terraform
• How to target subscribers in an SNS topic
• How CloudFront solves CORS problems
• How to setup CORS for Lambda Proxy integration
• Seamless S3 encryption does not imply better security
• Encryption in the cloud
• How to reproduce a Lambda function's environment variables locally
• How to define Lambda code with Terraform
• How to use Lambda@Edge with Terraform
• How to use API Gateway with CloudFront
• How to route to multiple origins with CloudFront
• AWS Config notifications with CloudWatch Events
• How to use unique resource names with Terraform
• How to use the AWS SQS CLI to receive messages
• How to paginate the AWS JS SDK using async generators
• How to clean up Lambda logs
• Differences between PUT and POST S3 signed URLs
• How to use S3 POST signed URLs
• How to use S3 PUT signed URLs
• Limit permissions with roles for signed URLs
• How to get near-realtime logs for a Terraform-managed Lambda function
• Cacheable S3 signed URLs
• Why AWS access and secret keys should not be in the codebase
• Why a multi-account setup is essential for secure systems
• CloudFormation CLI workflows
• How to check if your Reserved Instances are used
• How Service Control Policies help to secure AWS accounts
• AWS: How to query the available CPU credits for t2/t3 instances
• AWS: How to limit Lambda and API Gateway scalability
• AWS: Increase instance security by allowing SSH only from your IP
• AWS: How to get notified on compromised credentials
• Optimized SPA deployment CloudFormation template
• Keep costs under control when using t3 instances
• AWS: How to secure access keys with MFA
• Managing EC2 servers at scale: Ansible and RunCommand
• AWS: How to get notified on IAM user logins
• AWS: How to get notified on root account login
• The rocky path to delete an AWS Organizations member account
• How to use the PhysicalResourceId for CloudFormation Custom Resources
• Custom resources in CloudFormation templates: Lessons learned
• How to manage S3 Objects in CloudFormation templates
• How to manage custom CloudFormation resources with Lambda
• The anatomy of a CloudFormation template with a simple Lambda function
• Customizable monitoring script on AWS Lambda
• How to secure different types of CloudFront origins
• How Origin Access Identity works
• The differences between S3 and CloudFront signed URLs
• How to use S3 signed URLs with CloudFront
• How CloudFront signed URLs work
• How S3 Signed URLs work
• Historical monitoring on AWS

Javascript

• Hard-to-debug unhandled rejection cases
• Intro to PureScript for TypeScript developers
• How to generate an HTTPS certificate with node-forge
• How to sign, verify, and encrypt JWTs in Node
• Introducing: Async/await in Javascript video course
• Do not use fs sync methods in Javascript, use fs.promises instead
• How to avoid uncaught async errors in Javascript
• Getting started with the Jest Javascript testing framework
• What is the await statement in Javascript
• 3 genius visual data extraction attacks in Javascript
• How to implement a persistent file-based cache in Node.Js
• The async lazy initializer pattern in Javascript
• How to write a Webpack loader
• How to convert between callbacks and Promises in Javascript
• How to speed up Puppeteer scraping with parallelization
• How to implement an exponential backoff retry strategy in Javascript
• RxJS: How to make an ordered mergeMap operator
• RxJS: How to use startWith with pairwise
• RxJS: The differences between first(), take(1), and single()
• What is the async disposer pattern in Javascript
• How to cache ssm.getParameter calls in a Lambda function
• How to serialize calls to an async function
• How to handle timeouts in Lambda functions
• How to add timeout to a Promise in Javascript
• How to use async/await with postMessage
• How to use async functions with gapi, the Google Drive client, and the file picker
• Tips to debug NodeJS inside Docker
• How to refactor a Promise chain to async functions
• Secure tempfiles in NodeJS without dependencies
• How to use async functions with Array.some and every in Javascript
• How to use async functions with Array.filter in Javascript
• How to use async functions with Array.forEach in Javascript
• How to use async functions with Array.map in Javascript
• How to use async functions with Array.reduce in Javascript
• Asynchronous array functions in Javascript
• How to lazy load and initialize elements using an Intersection Observer
• How to integrate PlantUML into other software
• Adding continuous rendering to the PlantUML server
• How to paginate the AWS JS SDK using async generators
• How to clean up Lambda logs
• Why AWS access and secret keys should not be in the codebase
• How S3 Signed URLs work
• Best practices on how to work with collections in Javascript
• What to expect when you decide to migrate from Javascript to Typescript
• Introducing: Array#Extras email course
• Reuse code with domain-specific steps in collection pipelines
• The silver bullet of collection pipelines: Functional composition
• Demystifying chaining in Javascript
• Where Array#Extras fall short
• Ditch for loops. Here is a case study to convince you
• Better collection processing with collection pipelines
• 2 cases where Babel fixes your code but it shouldn't
• Generators and ImmutableJS
• Generators in Javascript
• Iterables in Javascript
• Iterators in Javascript
• Introducing: Weekly JS Tips & Tricks
• Parallel Processing in JS
• Simulating movement with ES6 generators
• Infinite collections with ES6 generators
• More readable Javascript without variables
• Proper random numbers in Javascript
• Dealing with async in React
• The first steps from Grunt to Webpack
• Custom CSS animations in React
• Global listener patterns in React
• React basics
• Isolating scripts on a page
• Historical monitoring on AWS
• Accessing Google Drive in Javascript
• Using Google auth in Javascript
• Running LP optimisation from Javascript

AppSync

• GraphQL tip: Only make fields required if they are present for all users
• GraphQL tip: Have the subscription types contain all filterable fields on the top-level.
• GraphQL non-nullable fields can lead to cascading null errors.
• Apollo's subscribeToMore is the wrong abstraction
• The slow evolution of AppSync RDS support
• How to use tagged templates in AppSync to send queries to RDS
• Announcing: Building GraphQL APIs with AWS AppSync book finished
• How to serve files from an AppSync API using S3 signed URLs
• How to implement file uploads to an AppSync API
• Efficient multi-level pagination in GraphQL
• First experiences with the new AppSync Javascript resolver runtime
• SNS to AppSync subscription
• How to use AppSync enhanced subscription filtering
• How to resolve interfaces and union types in AppSync
• How to escape inputs in AppSync resolvers
• What is the identity in the AppSync resolver context
• How to invoke a mutation with AppSync's HTTP data source
• How to interact with IoT Core shadows from AppSync
• How to read values from SSM Parameter Store and Secrets Manager with AppSync HTTP data source
• How to send notifications to SNS, SQS, and EventBridge from AppSync
• Modeling common GraphQL patterns in DynamoDB
• How to call API Gateway from AppSync with IAM authorization
• How to call a protected external API using AppSync HTTP data source
• Use the HTTP data source to interact with HTTP APIs directly from AppSync
• How to use RDS as a Data Source for AppSync
• How to resolve complex types with AppSync resolvers
• How IAM permissions work with AppSync
• How to add a custom domain to an AppSync API
• How to implement rate limiting for an AppSync API
• How to use Lambda authorization with AppSync
• How to configure Auth0 with AWS AppSync
• Real-time data with AppSync subscriptions
• Error handling in AppSync
• How to implement access control in a GraphQL API
• How to use Cognito with AppSync
• AppSync Cognito directives
• Pipeline resolvers in AppSync
• How to use DynamoDB with AppSync
• How to use Lambda resolvers with AppSync
• Anatomy of an AppSync resolver
• What are Resolvers in AppSync and how they work
• AWS AppSync: Getting started
• What is AWS AppSync

Security

• AWS management account starter pack
• How to auto-disable leaked IAM credentials
• Fooled by encryption
• How TOTP works
• How to hash passwords and when not to
• How to secure the Cognito login flow with a state nonce and PKCE
• AWS security case study: Vulnerable roles
• AWS security case study: Unprotected logs
• AWS security case study: Hardcoded credentials
• 3 genius visual data extraction attacks in Javascript
• What is end-to-end encryption and why it's such a confusing term
• What is the principle of least privilege and why it's such a hard thing to achieve
• How Firefox's HTTPS-only mode solves the first insecure request problem
• AWS IAM deep dive: Identity-based, and Resource-based policies
• How to completely lock down an AWS account with a service control policy (SCP)
• Are S3 signed URLs secure?
• What is the optimal password length
• How to setup CORS for Lambda Proxy integration
• Is Access-Control-Allow-Origin: * insecure?
• Seamless S3 encryption does not imply better security
• Encryption in the cloud
• Why a multi-account setup is essential for secure systems
• How Service Control Policies help to secure AWS accounts
• AWS: Increase instance security by allowing SSH only from your IP
• AWS: How to get notified on compromised credentials
• AWS: How to secure access keys with MFA
• AWS: How to get notified on IAM user logins
• AWS: How to get notified on root account login
• How to secure different types of CloudFront origins
• How CloudFront signed URLs work
• How I failed to implement CSP
• How to securely check your LastPass vault against the Pwned Passwords database
• Why certificate pinning with HPKP is a bad idea
• HTTPS security best practices

CloudFront

• How to use CloudFront signed cookies to serve MPD or HLS videos
• How to return a static file with a CloudFront function
• How to use KMS keys with CloudFront signed URLs
• How to use CloudFront signed URLs
• CloudFront function to remove part of the request path
• How to generate keys for CloudFront URL signing with Terraform
• CloudFront function to support HTML5 History API
• How to migrate to CloudFront Origin Access Control from Origin Access Identity
• CloudFront cache problems and how to solve them
• How to configure CloudFront for the HTML5 history API
• Why use a single domain for the backend and the frontend
• How to use CloudFront Functions to change the origin request path
• How to use CloudFront Trusted Key Groups parameter and the trusted_key_group Terraform resource
• How to debug CloudFront origin requests
• How CloudFront determines the origin request URL
• How CloudFront speeds up content delivery
• How CloudFront routing works
• How to use a custom domain with CloudFront and Route53
• How to use a custom domain on CloudFront with Cloudflare-managed DNS
• How to use the aws_apigatewayv2_api to add an HTTP API to a Lambda function
• How CloudFront solves CORS problems
• How to use Lambda@Edge with Terraform
• How to use API Gateway with CloudFront
• How to route to multiple origins with CloudFront
• Optimized SPA deployment CloudFormation template
• How to secure different types of CloudFront origins
• How Origin Access Identity works
• The differences between S3 and CloudFront signed URLs
• How to use S3 signed URLs with CloudFront
• How CloudFront signed URLs work

Lambda

• CloudFormation's ZipFile still does not support ESM imports
• How to use the AWS Lambda streaming response type
• Getting started with the AWS JS SDK v3 included in the Node runtime
• Deploy a serverless Telegram bot to AWS using Terraform
• How to use ES6 modules and top-level await in AWS Lambda
• How to delay calling a Lambda function using Step Functions
• How to periodically call a Lambda function
• Lambda development toolbox: Set environment variables locally
• Lambda development toolbox: CLI logs watcher
• How serverless cold starts change best practices
• How to cache ssm.getParameter calls in a Lambda function
• How to handle timeouts in Lambda functions
• How to implement a Lambda backend based on OpenAPI
• The consequences of memory allocation size for a Lambda function
• How to use the aws_apigatewayv2_api to add an HTTP API to a Lambda function
• Comparing async Javascript functions and callbacks on AWS Lambda
• Automatically schedule emails on MailChimp with RSS and AWS Lambda
• How to manage Lambda log groups with Terraform
• How to setup CORS for Lambda Proxy integration
• How to reproduce a Lambda function's environment variables locally
• How to define Lambda code with Terraform
• How to use Lambda@Edge with Terraform
• How to clean up Lambda logs
• How to get near-realtime logs for a Terraform-managed Lambda function
• AWS: How to limit Lambda and API Gateway scalability
• Optimized SPA deployment CloudFormation template
• How to manage S3 Objects in CloudFormation templates
• The anatomy of a CloudFormation template with a simple Lambda function
• Customizable monitoring script on AWS Lambda

Java

• New language features since Java 8 to 21
• A categorized list of all Java and JVM features since JDK 8 to 21
• Intro to Lucene
• How to integrate with Elastic Stack via Logstash
• How to integrate a containerized application with the Elastic Stack
• Using external libraries in JShell
• Prototyping with JShell
• Working with structured data in Java
• Two ways of skipping tests in Maven
• Dependency Injection Boundaries
• JUnit and Cucumber test reports based on source code and behavior
• Effective debugging with breakpoints
• Effective print debugging
• Profile-based optimization techniques in the JVM
• JVM JIT optimization techniques - part 2
• JVM JIT optimization techniques
• Using Java Generics to express variance of Collections and Functions
• Detecting errors in the browser with Selenium
• Getting started with OpenCV for Java on Ubuntu
• Crazy Search Results in Eclipse for Multiple Module Maven Projects
• Walkthrough for a TDD Kata in Eclipse
• Automated tests with Eclipse using MoreUnit
• Scott: detailed failure reports and hassle free assertions for Java tests
• Calm assertions with Spock
• Animated failure reports with Selenium and Cucumber
• Log review guided by tests
• Testing for undesired log output
• Attached Maven tests with Cucumber
• Running LP and IP optimisation from Java

Terraform

• Stable S3 signed URLs
• How to securely generate and store IAM Secret Access Keys with Terraform
• How to use KMS keys with CloudFront signed URLs
• How to generate keys for CloudFront URL signing with Terraform
• Terraform module to generate secret values and store in SSM Parameter Store
• How to use SSM Parameter Store for sensitive inputs in Terraform
• How to run SQL scripts against the RDS Data API with Terraform
• How to remove the RDS master user password from the Terraform state
• How to set up Amazon RDS password rotation with Terraform
• How to implement access control for a Telegram bot
• How to run npm ci from Terraform
• Interactive API documentation using Swagger UI deployed with Terraform
• Automatically schedule emails on MailChimp with RSS and AWS Lambda
• How to manage Lambda log groups with Terraform
• How to solve CORS problems when redirecting to S3 signed URLs
• How to deploy a single-page application with Terraform
• How to run a build script with Terraform
• How to reproduce a Lambda function's environment variables locally
• How to define Lambda code with Terraform
• How to use Lambda@Edge with Terraform
• How to use API Gateway with CloudFront
• How to route to multiple origins with CloudFront
• How to use unique resource names with Terraform
• How to get near-realtime logs for a Terraform-managed Lambda function

async/await

• Hard-to-debug unhandled rejection cases
• Introducing: Async/await in Javascript video course
• Do not use fs sync methods in Javascript, use fs.promises instead
• How to avoid uncaught async errors in Javascript
• What is the await statement in Javascript
• The async lazy initializer pattern in Javascript
• How to convert between callbacks and Promises in Javascript
• How to speed up Puppeteer scraping with parallelization
• How to implement an exponential backoff retry strategy in Javascript
• What is the async disposer pattern in Javascript
• How to serialize calls to an async function
• How to add timeout to a Promise in Javascript
• How to use async/await with postMessage
• How to use async functions with gapi, the Google Drive client, and the file picker
• How to refactor a Promise chain to async functions
• Comparing async Javascript functions and callbacks on AWS Lambda
• How to use async functions with Array.some and every in Javascript
• How to use async functions with Array.filter in Javascript
• How to use async functions with Array.forEach in Javascript
• How to use async functions with Array.map in Javascript
• How to use async functions with Array.reduce in Javascript
• Asynchronous array functions in Javascript

IAM

• AWS management account starter pack
• How to securely generate and store IAM Secret Access Keys with Terraform
• How IAM permissions work with AppSync
• How authentication and authorization work in AWS
• Introducing: AWS IAM masterclass video course
• 9 tips for working with AWS IAM
• Use-cases for IAM roles
• AWS IAM deep dive: How roles work
• How to use a break-glass role for sensitive admin tasks
• IAM policy evaluation logic explained with examples
• AWS IAM deep dive: How the policy evaluation logic works
• AWS IAM deep dive: How IAM users and groups work
• Granularity levels in AWS IAM policies
• The AWS account administrator's guide to MFA
• How to manage IAM user passwords
• AWS IAM deep dive: Identity-based, and Resource-based policies
• Limit permissions with roles for signed URLs
• AWS: How to secure access keys with MFA

Test

• Getting started with the Jest Javascript testing framework
• Testing Bash scripts with the Bats testing framework
• Function tests in Bash and the errexit mode
• How to mock in Bash tests
• Unit testing Bash scripts
• The need for an additional refactor phase in TDD
• JUnit and Cucumber test reports based on source code and behavior
• 3 Common Cucumber Mistakes You've Probably Made
• Detecting errors in the browser with Selenium
• Walkthrough for a TDD Kata in Eclipse
• Automated tests with Eclipse using MoreUnit
• Scott: detailed failure reports and hassle free assertions for Java tests
• Calm assertions with Spock
• Animated failure reports with Selenium and Cucumber
• Log review guided by tests
• Testing for undesired log output
• Attached Maven tests with Cucumber

Webdev

• Hardcoded assumptions
• Intro to PureScript for TypeScript developers
• Why use a single domain for the backend and the frontend
• How to use SRI hashes to secure third-party dependencies
• How to use async functions with gapi, the Google Drive client, and the file picker
• Refresh the browser when a text appears on the terminal
• Is Access-Control-Allow-Origin: * insecure?
• Introducing: Array#Extras email course
• Introducing: Weekly JS Tips & Tricks
• Why Webpack 2's Tree Shaking is not as effective as you think
• Getting started with Browserify
• JSPM basics and review
• Why Bower is still relevant
• Frontend dependencies without tools
• React basics
• Static HTTP preview server using Docker

S3 signed URLs

• Stable S3 signed URLs
• Announcing: S3 and CloudFront Signed URLs first public release
• How to serve files from an AppSync API using S3 signed URLs
• How to implement file uploads to an AppSync API
• Are S3 signed URLs secure?
• How to solve CORS problems when redirecting to S3 signed URLs
• Differences between PUT and POST S3 signed URLs
• How to use S3 POST signed URLs
• How to use S3 PUT signed URLs
• Limit permissions with roles for signed URLs
• Cacheable S3 signed URLs
• The differences between S3 and CloudFront signed URLs
• How to use S3 signed URLs with CloudFront
• How S3 Signed URLs work

Vim

• How to compare file revisions with fugitive.vim
• Dive into Git history with fugitive.vim
• Working with the system clipboard in Vim
• Tips on window management in Vim
• Use last-position-jump to recover context after reopening a file with Vim
• Use Persistent Undo in Vim for maximum comfort
• Never lose a change again: Undo branches in Vim
• Copy-pasting in Vim without +clipboard
• Managing Scala projects in Vim with Ag and Ctags
• One year with Vim
• 5 Productivity Power Tools for Software Development on Linux
• Scala development in Vim
• Why you should care about Vim

DynamoDB

• DynamoDB basic operations
• The effects of not maintaining consistency with DynamoDB
• Modeling common GraphQL patterns in DynamoDB
• Efficient filtering in DynamoDB
• The surprising properties of DynamoDB pagination
• How to use DynamoDB with AppSync
• How to maintain database consistency in DynamoDB
• Foreign key constraints in DynamoDB
• How to keep accurate counts in DynamoDB
• How to properly implement unique constraints in DynamoDB
• How to clear a DynamoDB table
• How to use DynamoDB batch write with retrying and exponential backoff

IoT

• Let's build a simple MQTT echo on AWS IoT Core
• How to detect device connection and disconnection in AWS IoT Core
• TLS certificates in IoT Core
• How to use Topic Rules to react to MQTT messages in AWS IoT Core
• How to generate IoT Core certificates with Terraform
• Basic AWS IoT Core policy example and breakdown
• How to connect to AWS IoT Core with MQTT.js
• How to manage IoT Core resources with Terraform
• The basic building blocks of AWS IoT Core
• How to interact with IoT Core shadows from AppSync

CloudFormation

• AWS management account starter pack
• CloudFormation's ZipFile still does not support ESM imports
• How to auto-disable leaked IAM credentials
• How to use cfn-init to set up EC2 instances with CloudFormation
• CloudFormation CLI workflows
• Optimized SPA deployment CloudFormation template
• How to use the PhysicalResourceId for CloudFormation Custom Resources
• Custom resources in CloudFormation templates: Lessons learned
• How to manage custom CloudFormation resources with Lambda
• The anatomy of a CloudFormation template with a simple Lambda function

Bash

• How to save entered values in Bash
• Refresh the browser when a text appears on the terminal
• Testing Bash scripts with the Bats testing framework
• Function tests in Bash and the errexit mode
• How to mock in Bash tests
• Unit testing Bash scripts
• Debugging Bash scripts
• How to Bash and jq: generate statistics for a REST API
• How to securely check your LastPass vault against the Pwned Passwords database
• Deploying Docker images via SSH

Docker

• Tips to debug NodeJS inside Docker
• Using Let's Encrypt with Supervisor
• Supervisor with Docker: Lessons learned
• Fully automated dockerized Let's Encrypt reverse proxy
• Static HTTP preview server using Docker
• Revisiting webapp performance on HTTP/2
• Historical monitoring on AWS
• Deploying Docker images via SSH
• Quick and dirty way to build PhantomJS2 from source

Maven

• Two ways of skipping tests in Maven
• JUnit and Cucumber test reports based on source code and behavior
• Crazy Search Results in Eclipse for Multiple Module Maven Projects
• Scott: detailed failure reports and hassle free assertions for Java tests
• Calm assertions with Spock
• Animated failure reports with Selenium and Cucumber
• Log review guided by tests
• Testing for undesired log output
• Attached Maven tests with Cucumber

Linux

• How to write a simple systemd timer
• Supervisor with Docker: Lessons learned
• Copy-pasting in Vim without +clipboard
• Managing Scala projects in Vim with Ag and Ctags
• Lessons learned from using xmonad for a year
• 5 Productivity Power Tools for Software Development on Linux
• Scala development in Vim
• Quick and dirty way to build PhantomJS2 from source

GraphQL

• GraphQL tip: Only make fields required if they are present for all users
• GraphQL tip: Have the subscription types contain all filterable fields on the top-level.
• GraphQL non-nullable fields can lead to cascading null errors.
• Apollo's subscribeToMore is the wrong abstraction
• How to resolve interfaces and union types in AppSync
• How to resolve complex types with AppSync resolvers
• What is AWS AppSync

Cognito

• How Cognito User Pools work
• How to use Cognito with AppSync
• AppSync Cognito directives
• How token revocation works in Cognito
• How to use the refresh token with Cognito
• How to secure the Cognito login flow with a state nonce and PKCE
• How to add Cognito login to a website

S3

• Stable S3 signed URLs
• Encryption options for S3 objects
• How to route to an arbitrary S3 bucket website with Cloudflare Workers
• How to add HTTPS for an S3 bucket website with Cloudflare
• Avoid excessive costs and save money with S3 storage classes
• Seamless S3 encryption does not imply better security
• How to manage S3 Objects in CloudFormation templates

Let's Encrypt

• How to use Let's Encrypt with Node.js and Express
• Using Let's Encrypt with Supervisor
• Let's Encrypt hooks use cases
• When to use Let's Encrypt's webroot and standalone authorization
• Let's Encrypt tips
• Getting started with Let's Encrypt
• Fully automated dockerized Let's Encrypt reverse proxy

Integration-test

• JUnit and Cucumber test reports based on source code and behavior
• 3 Common Cucumber Mistakes You've Probably Made
• Detecting errors in the browser with Selenium
• Animated failure reports with Selenium and Cucumber
• Log review guided by tests
• Testing for undesired log output
• Attached Maven tests with Cucumber

API Gateway

• How to call API Gateway from AppSync with IAM authorization
• How to use OpenAPI with API Gateway REST APIs
• How to use OpenAPI to deploy an API Gateway HTTP API
• How to use the aws_apigatewayv2_api to add an HTTP API to a Lambda function
• How to use API Gateway with CloudFront
• AWS: How to limit Lambda and API Gateway scalability

Git

• Git Tips and Tricks
• How to compare file revisions with fugitive.vim
• Dive into Git history with fugitive.vim
• How to create a good Pull Request
• 3 ways to set up author information in Git
• Git to track local history, without a remote

Eclipse

• Effective debugging with breakpoints
• Effective print debugging
• Getting started with OpenCV for Java on Ubuntu
• Crazy Search Results in Eclipse for Multiple Module Maven Projects
• Walkthrough for a TDD Kata in Eclipse
• Automated tests with Eclipse using MoreUnit

Cucumber

• JUnit and Cucumber test reports based on source code and behavior
• 3 Common Cucumber Mistakes You've Probably Made
• Detecting errors in the browser with Selenium
• Animated failure reports with Selenium and Cucumber
• Log review guided by tests
• Attached Maven tests with Cucumber

RDS

• How to use tagged templates in AppSync to send queries to RDS
• How to use RDS as a Data Source for AppSync
• How to run SQL scripts against the RDS Data API with Terraform
• How to remove the RDS master user password from the Terraform state
• How to set up Amazon RDS password rotation with Terraform

Telegram

• How to call a protected external API using AppSync HTTP data source
• The easiest way to set up a chat with your Telegram bot
• How to implement access control for a Telegram bot
• Send notifications to a Telegram bot for events in an AWS account
• Deploy a serverless Telegram bot to AWS using Terraform

CLI

• Lambda development toolbox: Set environment variables locally
• Lambda development toolbox: CLI logs watcher
• How to use the AWS SQS CLI to receive messages
• How to get near-realtime logs for a Terraform-managed Lambda function
• CloudFormation CLI workflows

Debugging

• Debugging Bash scripts
• Effective debugging with breakpoints
• Effective print debugging
• End-to-end manual verification
• Listen to your code: Problem-solving techniques in programming

HTTPS

• How to add HTTPS for an S3 bucket website with Cloudflare
• How to handle mixed content with CSP
• Why certificate pinning with HPKP is a bad idea
• HTTPS security best practices
• Fully automated dockerized Let's Encrypt reverse proxy

React

• Dealing with async in React
• The first steps from Grunt to Webpack
• Custom CSS animations in React
• Global listener patterns in React
• React basics

CORS

• How to solve CORS problems when redirecting to S3 signed URLs
• How CloudFront solves CORS problems
• How to setup CORS for Lambda Proxy integration
• Is Access-Control-Allow-Origin: * insecure?
• A simple proxy to circumvent the SOP

RxJS

• How to speed up Puppeteer scraping with parallelization
• RxJS: How to make an ordered mergeMap operator
• RxJS: How to use startWith with pairwise
• RxJS: The differences between first(), take(1), and single()

OpenAPI

• How to use OpenAPI with API Gateway REST APIs
• How to use OpenAPI to deploy an API Gateway HTTP API
• How to implement a Lambda backend based on OpenAPI
• Interactive API documentation using Swagger UI deployed with Terraform

DNS

• How to test with a live domain name for free
• How to use a custom domain with CloudFront and Route53
• How to use a custom domain on CloudFront with Cloudflare-managed DNS
• What is CNAME flattening and how it helps redirecting the apex domain

Cloudflare

• How to use a custom domain on CloudFront with Cloudflare-managed DNS
• What is CNAME flattening and how it helps redirecting the apex domain
• How to route to an arbitrary S3 bucket website with Cloudflare Workers
• How to add HTTPS for an S3 bucket website with Cloudflare

Typescript

• Modern JavaScript library starter
• Intro to PureScript for TypeScript developers
• Getting started with the Jest Javascript testing framework
• What to expect when you decide to migrate from Javascript to Typescript

generators

• Generators and ImmutableJS
• Generators in Javascript
• Simulating movement with ES6 generators
• Infinite collections with ES6 generators

JVM

• A categorized list of all Java and JVM features since JDK 8 to 21
• Profile-based optimization techniques in the JVM
• JVM JIT optimization techniques - part 2
• JVM JIT optimization techniques

Webpack

• How to write a Webpack loader
• Why Webpack 2's Tree Shaking is not as effective as you think
• Parallel Processing in JS
• The first steps from Grunt to Webpack

Node.js

• How to sign, verify, and encrypt JWTs in Node
• How to use Let's Encrypt with Node.js and Express
• A simple proxy to circumvent the SOP
• Detecting possibly duplicate Strings

NodeJs

• Dataset preparation for training a neural text-to-speech model with Piper TTS
• How to transfer binary data efficiently across worker threads in NodeJs
• Using worker pools in NodeJs

Elastic Stack

• Custom Aggregations in Logstash with the Ruby Filter Plugin
• How to integrate with Elastic Stack via Logstash
• How to integrate a containerized application with the Elastic Stack

SNS

• Fun fact: you can make an unsubscribable subscription to an SNS topic
• SNS to AppSync subscription
• How to target subscribers in an SNS topic

Organizations

• Why a multi-account setup is essential for secure systems
• How Service Control Policies help to secure AWS accounts
• The rocky path to delete an AWS Organizations member account

Performance

• Profile-based optimization techniques in the JVM
• JVM JIT optimization techniques - part 2
• JVM JIT optimization techniques

JIT

• Profile-based optimization techniques in the JVM
• JVM JIT optimization techniques - part 2
• JVM JIT optimization techniques

ES6

• Simulating movement with ES6 generators
• Infinite collections with ES6 generators
• More readable Javascript without variables

commentary

• A brief overview of hack.summit() 2016 (part 3)
• A brief overview of hack.summit() 2016 (part 2)
• A brief overview of hack.summit() 2016 (part 1)

hack.summit() 2016

• A brief overview of hack.summit() 2016 (part 3)
• A brief overview of hack.summit() 2016 (part 2)
• A brief overview of hack.summit() 2016 (part 1)

TDD

• The need for an additional refactor phase in TDD
• Walkthrough for a TDD Kata in Eclipse
• Automated tests with Eclipse using MoreUnit

gapi

• How to use async functions with gapi, the Google Drive client, and the file picker
• Accessing Google Drive in Javascript
• Using Google auth in Javascript

Selenium

• 3 Common Cucumber Mistakes You've Probably Made
• Detecting errors in the browser with Selenium
• Animated failure reports with Selenium and Cucumber

Logging

• Detecting errors in the browser with Selenium
• Log review guided by tests
• Testing for undesired log output

AI

• Thoughts on unreliable computing
• Thoughts on using AI for coding

JavaScript

• How to transfer binary data efficiently across worker threads in NodeJs
• Using worker pools in NodeJs

CDK

• How to remove a resource before creating it with the CDK
• The problems with implicit AWS resources

Syncthing

• How to monitor Syncthing
• How Syncthing provides secure file syncing without sharing your files with a third party

Spring Boot

• How to integrate with Elastic Stack via Logstash
• How to integrate a containerized application with the Elastic Stack

CloudWatch

• AWS Config notifications with CloudWatch Events
• AWS: How to query the available CPU credits for t2/t3 instances

CloudTrail

• CloudTrail's horrible developer experience
• AWS: How to get notified on compromised credentials

NPM

• Modern JavaScript library starter
• How to automate development tasks using NPX

Cost Optimizations

• How to check if your Reserved Instances are used
• Keep costs under control when using t3 instances

EC2

• EC2 VPC building blocks
• Keep costs under control when using t3 instances

MFA

• The AWS account administrator's guide to MFA
• AWS: How to secure access keys with MFA

Custom Resources

• How to use the PhysicalResourceId for CloudFormation Custom Resources
• Custom resources in CloudFormation templates: Lessons learned

CSP

• How to handle mixed content with CSP
• How I failed to implement CSP

Supervisor

• Using Let's Encrypt with Supervisor
• Supervisor with Docker: Lessons learned

IntelliJ IDEA

• Effective debugging with breakpoints
• Effective print debugging

Magento

• Magento 2 - Programmatically recreate the missing Catalog Search index table
• How to create a Theme Plugin for Magento

Dotfiles

• Lessons learned from using xmonad for a year
• 5 Productivity Power Tools for Software Development on Linux

xmonad

• Lessons learned from using xmonad for a year
• 5 Productivity Power Tools for Software Development on Linux

Management

• A tale of two development competitions
• Some thoughts on managing small development teams

Scott

• JUnit and Cucumber test reports based on source code and behavior
• Scott: detailed failure reports and hassle free assertions for Java tests

SOP

• Isolating scripts on a page
• A simple proxy to circumvent the SOP

Spock

• Scott: detailed failure reports and hassle free assertions for Java tests
• Calm assertions with Spock

Scala

• Managing Scala projects in Vim with Ag and Ctags
• Scala development in Vim

AngularJS

• Accessing Google Drive in Javascript
• Using Google auth in Javascript

Ruby

• How to integrate PlantUML into other software
• MathJax processing on the server-side

JSON

• Working with structured data in Java
• Efficient SQLite backup on Android

Backup Manager

• Efficient SQLite backup on Android
• Practical measurement of the Android Backup Manager

Android

• Efficient SQLite backup on Android
• Practical measurement of the Android Backup Manager

LP

• Running LP optimisation from Javascript
• Running LP and IP optimisation from Java

mathematics

• Running LP optimisation from Javascript
• Running LP and IP optimisation from Java

integration

• Integrating Facebook Comment Count Sum
• Integrating Facebook Comments

facebook

• Integrating Facebook Comment Count Sum
• Integrating Facebook Comments

privacy

• How things work matters

security

• How things work matters

puzzle

• The twists of the Ballmer puzzle

cloud

• The hidden cost multiplier of fixed-price cloud resources

cost

• The hidden cost multiplier of fixed-price cloud resources

aws

• The hidden cost multiplier of fixed-price cloud resources

recommendation

• Notes on "Hardest Problem in Computer Science: Centering Things"

complexity

• Notes on "Hardest Problem in Computer Science: Centering Things"

EventBridge

• CloudTrail's horrible developer experience

TTS

• Dataset preparation for training a neural text-to-speech model with Piper TTS

Courses

• Introducing: subscriptions to books and courses

Books

• Introducing: subscriptions to books and courses

Nix

• First experiences with Nix shell

KMS

• How to use KMS keys with CloudFront signed URLs

Functional Programming

• Intro to PureScript for TypeScript developers

PureScript

• Intro to PureScript for TypeScript developers

TOTP

• How TOTP works

Search

• Intro to Lucene

Lucene

• Intro to Lucene

WAF

• How to implement rate limiting for an AppSync API

GCP

• Intro to AppSheet

AppSheet

• Intro to AppSheet

Ruby Filter Plugin

• Custom Aggregations in Logstash with the Ruby Filter Plugin

Logstash

• Custom Aggregations in Logstash with the Ruby Filter Plugin

Jest

• Getting started with the Jest Javascript testing framework

VPC

• EC2 VPC building blocks

SCP

• How to completely lock down an AWS account with a service control policy (SCP)

melt

• Generating a crossfaded slideshow video from images with ffmpeg and melt

ffmpeg

• Generating a crossfaded slideshow video from images with ffmpeg and melt

Jekyll

• How to change a blog's permalinks and not lose all organic traffic

jq

• How to Bash and jq: generate statistics for a REST API

MailChimp

• Automatically schedule emails on MailChimp with RSS and AWS Lambda

PlantUML

• How to integrate PlantUML into other software

Config Rules

• AWS Config notifications with CloudWatch Events

SQS

• How to use the AWS SQS CLI to receive messages

SSH

• AWS: Increase instance security by allowing SSH only from your IP

SSM

• Managing EC2 servers at scale: Ansible and RunCommand

Ansible

• Managing EC2 servers at scale: Ansible and RunCommand

Serverless

• Customizable monitoring script on AWS Lambda

Pwned Passwords

• How to securely check your LastPass vault against the Pwned Passwords database

LastPass

• How to securely check your LastPass vault against the Pwned Passwords database

HPKP

• Why certificate pinning with HPKP is a bad idea

Spring

• Dependency Injection Boundaries

Dependency Injection

• Dependency Injection Boundaries

Komodo

• Effective print debugging

Babel

• 2 cases where Babel fixes your code but it shouldn't

Browserify

• Getting started with Browserify

JSPM

• JSPM basics and review

Ctags

• Managing Scala projects in Vim with Ag and Ctags

Ag

• Managing Scala projects in Vim with Ag and Ctags

Bower

• Why Bower is still relevant

Web Workers

• Parallel Processing in JS

Generics

• Using Java Generics to express variance of Collections and Functions

random

• Proper random numbers in Javascript

Ubuntu

• Getting started with OpenCV for Java on Ubuntu

OpenCV

• Getting started with OpenCV for Java on Ubuntu

Grunt

• The first steps from Grunt to Webpack

Broken windows theory

• Unbroken windows - overengineering in the name of clean code

Refactoring

• Unbroken windows - overengineering in the name of clean code

Konsole

• 5 Productivity Power Tools for Software Development on Linux

Less

• 5 Productivity Power Tools for Software Development on Linux

Zsh

• 5 Productivity Power Tools for Software Development on Linux

HTTP/2

• Revisiting webapp performance on HTTP/2

SQL

• A solution to Codility Kalium

Codility

• A solution to Codility Kalium

Groovy

• Calm assertions with Spock

D3.js

• Historical monitoring on AWS

Google Drive

• Accessing Google Drive in Javascript

Google auth

• Using Google auth in Javascript

Gem

• MathJax processing on the server-side

MathJax

• MathJax processing on the server-side

Pocket

• MathJax processing on the server-side

PhantomJS

• Quick and dirty way to build PhantomJS2 from source

Levenshtein distance

• Detecting possibly duplicate Strings

duplicates

• Detecting possibly duplicate Strings

Strings

• Detecting possibly duplicate Strings

GZIP

• Efficient SQLite backup on Android

SQLite

• Efficient SQLite backup on Android

IP

• Running LP and IP optimisation from Java

SVG

• Plotting charts with SVG

Catmull-Rom

• Plotting charts with SVG

spdy

• Integrating Facebook Comment Count Sum

http

• Integrating Facebook Comment Count Sum