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DevDecks was built to help you solve coding problems, while also building utilities to make your days more productive. I hope you enjoy your stay 🏡 .
Difference between before_save and before_update and before_create in Rails
2022-01-18
rails
active-record
How to call a Rails method before a validations occur
2022-01-17
rails
active-record
When to use <> vs <div> in React
2022-01-15
react
fragment
Why did your HTML select get wider
2022-01-14
html
select
Multiline inline conditional rendering React
2022-01-13
react
rendering
Why is your HTML elements font weight not updating?
2022-01-12
html
font-weight
Setting defaultProps and propTypes in a functional vs a class component
2022-01-11
react
proptypes
Filter a JavaScript array for HTML element type
2022-01-10
JavaScript
array
filter
Can you call map/filter/reduce on an HTMLCollection?
2022-01-09
HTMLCollection
JavaScript
array
How to generate uuids in a Ruby on Rails application
2022-01-08
rails
uuid
How does Rails handle referential integrity
2022-01-07
rails
active-record
database
How to handle token auth in Rails
2022-01-02
rails
auth
token
Ruby on Rails integration testing cheatsheet
2022-01-01
rails
testing
cheatsheet
Creating a table with non id primary key in Rails
2021-12-26
rails
database
active-record
Same database table parent/child relationship using Rails
2021-12-25
rails
active-record
database
Creating links using non-interactive elements in React
2021-11-22
react
links
Migrating behavior from instance based to class based
2021-11-20
ruby
oop
Rails controllers and nested resources
2021-11-05
rails
routing
Redirect to nested resource url in Rails
2021-11-04
rails
form
routing
Rendering forms for parent and child ActiveRecord objects in Rails
2021-11-03
rails
form
Accessing data from a join query in Rails
2021-11-02
rails
database
join
Rails nested resources MVC complete example
2021-11-01
rails
mvc
form
How to determine the rough size (heaviness) of an object in Ruby
2021-10-19
ruby
Why private directories exist on macOS
2021-10-17
macOS
operating-systems
Understanding URLs: Subdomains
2021-10-15
deck
url-deck
urls
Understanding URLs: Path Parameters
2021-10-14
deck
url-deck
urls
Understanding URLs: Query Parameters
2021-10-13
deck
url-deck
urls
Understanding URLs: Fragments
2021-10-12
deck
url-deck
urls
Understanding the Same Origin Polcy
2021-10-11
security
deck
security-deck
Understanding Preflight Requests
2021-10-10
security
deck
security-deck
Understanding JWT
2021-10-09
security
deck
security-deck
How to set default values in Graphql Schemas
2021-10-08
graphql
How to tell if an argument is required in Graphql?
2021-10-07
graphql
Method returning memoized object is called with different arguments
2021-10-06
ruby
memoization
Retry failed Gigalixir/PAAS deploy
2021-10-05
gigalixir
paas
deploy
Understanding Elixir GenServer
2021-10-04
elixir
deck
elixir-deck
Understanding Elixir Mix
2021-10-03
elixir
deck
elixir-deck
Understanding Elixir Agent
2021-10-02
elixir
deck
elixir-deck
Understanding Elixir MapSet
2021-10-01
elixir
deck
elixir-deck
Understanding Elixir Supervisor
2021-09-30
elixir
deck
elixir-deck
Understanding Elixir Task
2021-09-29
elixir
deck
elixir-deck
Understanding Elixir Process
2021-09-28
elixir
deck
elixir-deck
Understanding Elixir Streams
2021-09-27
elixir
deck
elixir-deck
Understanding Elixir Comprehensions
2021-09-26
elixir
deck
elixir-deck
Understanding Elixir Enum
2021-09-25
elixir
deck
elixir-deck
Understanding Elixir Range
2021-09-24
elixir
deck
elixir-deck
Ruby no preset version installed asdf
2021-09-21
ruby
asdf
Change Ecto timestamps from inserted_at to created_at
2021-09-20
elixir
ecto
Elixir Protocols for new developers
2021-09-15
elixir
deck
elixir-deck
Elixir Structs for new developers
2021-09-14
elixir
deck
elixir-deck
Create a custom Mix task by example
2021-09-13
elixir
mix
Elixir Modules for new developers
2021-09-07
elixir
deck
elixir-deck
Elixir file extensions for new developers
2021-09-06
elixir
deck
elixir-deck
How to use a ConfigMap file for postgres environment variables in Kubernetes
2021-09-05
kubernetes
Understanding Cross Origin Resource Sharing (cors) for new developers
2021-09-04
security
deck
Understanding Elixir Functions for new developers part 2
2021-09-03
elixir
deck
elixir-deck
Everything you may have wanted to know about Dates and Times in Ruby and Rails
2021-09-02
ruby
rails
Understanding Elixir Functions for new developers part 1
2021-09-01
elixir
deck
elixir-deck
Understanding Elixir Maps for new developers
2021-08-31
elixir
deck
elixir-deck
Convert an Elixir List into a comma separated String
2021-08-30
elixir
Difference between rake tmp:clear and Rails.cache.clear
2021-08-29
rails
caching
Differences between window assign, open, replace, and href= in JS
2021-08-28
javascript
Connecting Kubernetes Services to Deployments
2021-08-27
kubernetes
When to use which service type in Kubernetes
2021-08-26
kubernetes
Kubernetes configuration ports explained
2021-08-25
kubernetes
How to use a secrets file for postgres credentials using Kubernetes
2021-08-24
kubernetes
Connecting Kubernetes Deployments to Pods
2021-08-23
kubernetes
Kubernetes node processes explained
2021-08-22
kubernetes
Kubernetes kubectl commands for newbies
2021-08-21
kubernetes
Kubernetes Control Plane processes explained
2021-08-21
kubernetes
How to view a Kubernetes pods IP address
2021-08-20
kubernetes
How to view the status data in a Kubernetes Deployment
2021-08-19
kubernetes
How to read Ruby Gemfile package versions
2021-08-16
ruby
rubygems
How to get and filter a list of previously executed commands on macOS
2021-08-15
macOS
command-line
The missing guide to troubleshooting RubyGem issues
2021-08-14
ruby
rubygems
How to base64 encode a string using the command line on macOS
2021-08-13
macOS
command-line
How to memoize a conditional in Ruby
2021-08-12
memoization
ruby
Man In The Middle (MITM) attack explained through q&a
2021-08-11
web-attacks
security-deck
deck
Create your first Rails app cluster with Kubernetes and Docker - Part 1
2021-08-10
kubernetes
docker
ops
Elixir Lists explained through q&a
2021-08-09
elixir
deck
elixir-deck
How to push a local Docker Image to Docker Hub
2021-08-08
docker
ops
Chrome Manifest v2 background script vs v3 service worker
2021-08-07
chrome-extensions
Cross Site Request Forgery explained through q&a
2021-08-05
web-attacks
security-deck
deck
Elixir Tuples explained through q&a
2021-08-04
elixir
deck
elixir-deck
Chrome Manifest v2 browser action vs v3 service worker
2021-08-03
chrome-extensions
Cross Site Scripting explained through q&a
2021-08-02
web-attacks
security-deck
deck
Elixir Atoms and Integers explained through q&a
2021-08-01
elixir
deck
elixir-deck
Chrome developer Manifest v3 permissions
2021-07-26
chrome-extensions
Set multiple variables to a single value using Ruby or Elixir
2021-07-15
elixir
ruby
301 vs 302 redirects using Phoenix
2021-07-14
phoenix
elixir
The difference between Sidekiq's Kill and Delete functions
2021-07-13
sidekiq
Migrating to Elixir's Earmark for markdown processing
2021-06-05
elixir
earmark
An series of introductions to Elixir Processes
2021-06-04
elixir
beam
processes
Learn Elixir Comprehensions through q&a
2021-05-30
elixir
comprehensions
elixir-deck
An introduction to BEAM/Elixir processes in Phoenix
2021-05-28
elixir
phoenix
beam
Do BEAM/Elixir processes provide concurrency or enable parallelism?
2021-05-17
elixir
processes
beam
Elixir process module cheatsheet
2021-05-16
elixir
processes
cheatsheet
BEAM/Elixir 'let it crash': what it does and does not mean
2021-05-15
elixir
beam
processes
BEAM/Elixir processes for web programmers
2021-05-14
elixir
beam
processes
Ruby http gem cheatsheet
2021-05-08
ruby
http
cheatsheet
rubygems
Issue a dynamic url with Rails route helpers
2021-05-07
rails
urls
dynamic-routing
Check if an HTTP status falls within a range using Ruby
2021-05-06
rails
http
When early code optimization is okay, an example
2021-05-02
oauth
rails
clean-code
Rails db encryption cheatsheet
2021-04-29
rails
cheatsheet
database
Jest testing with React cheatsheet
2021-04-28
jest
react
testing
cheatsheet
Rails error handling cheatsheet
2021-04-20
rails
cheatsheet
Rails params cheatsheet
2021-04-19
rails
cheatsheet
How to set state from a URL using React
2021-04-17
react
HTTP Status Code Range Meanings - 100, 200, 300, 400, 500
2021-04-15
http
networking
An example of when to expire a cache key
2021-04-10
rails
cache
Delete a cache key from Sidekiq using Rails
2021-04-05
rails
database
Persist multiple records in one database transaction using Rails
2021-04-03
rails
database
Guarav Sen - API Design Notes
2021-04-02
system-design
api
How to get text from a URL string in Ruby
2021-03-31
ruby
Create scheduled posts using NimblePublisher
2021-03-27
elixir
nimblepublisher
cms
npm run build command explained
2021-03-26
javascript
react
npm
When to make your JavaScript library available through a CDN and NPM package
2021-03-25
javascript
npm
How to copy text from a collection of non input elements in JavaScript
2021-03-18
javascript
How to get unique values for a database column in Rails
2021-03-17
rails
active-record
How to mock custom React Hooks with Jest
2021-03-16
react
hooks
jest
How to get your username in Git and NPM
2021-03-11
git
npm
How not to memoize in Ruby
2021-03-10
ruby
rails
memoization
Mixins and mixin variables in SCSS, a brief example
2021-03-06
scss
stylesheets
Apply CSS styling to all but last selected element
2021-03-05
css
stylesheets
Apply CSS styling to only first two elements
2021-03-04
css
stylesheets
Add view helpers to a Rails application, globally and locally.
2021-03-01
rails
ruby
Retroactively add timestamps to a Phoenix/Ecto project
2021-02-07
ecto
databases
phoenix
elixir
Iterate and convert an XSS collection to hash in Ruby
2021-02-06
ruby
xss
nokogiri
collections
Add a sitemap to a Phoenix project
2020-12-22
sitemap
xml
phoenix
elixir
Iterate a collection with indexes in Phoenix template
2020-12-20
phoenix
elixir
templates
Lessons learned about on-page SEO for developers from a developer in 2021
2020-12-18
seo
phoenix
guide
cms
3 tips for using Darkmode.js in your application
2020-12-14
darkmode
javascript
css
When does a Rails application load and read my code?
2020-12-12
ruby
rails
program-execution
On-page SEO meta-tags and page-title for Phoenix applications
2020-12-11
seo
cms
elixir
phoenix
Deploying a clean build to Gigalixir (update Elixir version)
2020-12-09
elixir
gigalixir
deploys
How to use images in NimblePublisher posts
2020-12-08
elixir
phoenix
cms
Route static paths across LiveView and App templates
2020-12-05
elixir
liveview
phoenix
server-side-html
