How to deal with RSpec time precision error

In some cases, Ruby uses higher precision to represent time than the DB. When we compare a timestamp before and after saving to the DB it might not be equal.

TCP Server in Elixir

How to setup a simple, but robust TCP server in Elixir

RSpec rerun failures

How to configure RSpec to rerun failed specs only

Example tmux script for Rails

Shell script that will start a tmux session with Rails console and server in side panes

Prettier raw SQL in ruby

Use this syntax to format raw SQL nicely in ruby code. In some editors it also enables SQL syntax highlighting.

Use React.Fragment to avoid creating useless divs

This jsx ```react <React.Fragment> <h1>Hello World</h1> <p>This is paragraph</p> </React.Fragment> ``` Will be compiled into this html ```h...

How to inspect an element that disappears on click (in chrome)

In chrome developer tools go to "Sources" find "Event Listener Breakpoints" and select "Mouse -> mousedown". Now each time the event is triggered, chrome wil...

Pundit Decorator

Organize Pundit error messages and redirects in a decorator. Simplify reuse and maintenance

Move last commit to a feature branch

When you accidentally commit to master/staging and need to move the commit to a feature branch

Close a frozen ssh session

Properly close a frozen ssh session

Set the same password for all users in one query

Reset devise passwords quickly, even for thousands of users.

Generate fake screenshot mockups in minutes

This app allows you to upload screenshots and paste them into a fake phone/laptop mockup.

Style PDFs using metric units in CSS with wicked pdf

Configure wicked_pdf with: ```ruby disable_smart_shrinking: true ``` Then you can accurately use `mm` and `cm` as units in your CSS

Line icons based on Font Awesome

Replace Font Awesome with modern line icons with a single line of code.

Multiline method memoization in ruby

Method memoization in ruby is easy when the method is one line long: ``` def something @something ||= # your calculations end ``` But when we hav...

Global payment/billing provider compatible with EU laws

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Hello World in Slack

See the link for setup instructions. Then in ruby: ```ruby conn = do |req| req.headers['Content-Type'] ...

Make RSpec shared examples easier to understand with this one trick!

This guy makes his shared examples easier to understand. Overpaid consultants hate him!

When to use let, let! and before in RSpec

When to use let, let! and before in RSpec.

Using comment notes in Rails

In your code: ```ruby # TODO: fix this ``` In your shell: ```bash % rake notes ``` ```text config/routes.rb: * [ 1] [TODO] fix this ```

Debugging Turbolinks 5

```javascript document.addEventListener('turbolinks:click', () => console.log('turbolinks:click')) document.addEventListener('turbolinks:before-visit', () ...