Skip to content

Instantly share code, notes, and snippets.

View rosalynnas's full-sized avatar

rosalynnas rosalynnas

View GitHub Profile
@gunjanpatel
gunjanpatel / revert-a-commit.md
Last active September 20, 2025 22:27
Git HowTo: revert a commit already pushed to a remote repository

Revert the full commit

Sometimes you may want to undo a whole commit with all changes. Instead of going through all the changes manually, you can simply tell git to revert a commit, which does not even have to be the last one. Reverting a commit means to create a new commit that undoes all changes that were made in the bad commit. Just like above, the bad commit remains there, but it no longer affects the the current master and any future commits on top of it.

git revert {commit_id}

About History Rewriting

Delete the last commit

Deleting the last commit is the easiest case. Let's say we have a remote origin with branch master that currently points to commit dd61ab32. We want to remove the top commit. Translated to git terminology, we want to force the master branch of the origin remote repository to the parent of dd61ab32:

@jacklorusso
jacklorusso / workbench.colorCustomizations.json
Last active December 23, 2025 21:53
A list of all Visual Studio Code customizable colors, grouped by UI region. Copy and paste into User Settings (comments are allowed) to tweak an existing theme or work on your own.
"workbench.colorCustomizations": {
// Contrast Colors - The contrast colors are typically only set for high contrast themes. If set, they add an additional border around items across the UI to increase the contrast.
"contrastActiveBorder": "",
"contrastBorder": "",
// Base Colors
"focusBorder": "",
"foreground": "",
"widget.shadow": "",
"selection.background": "",
"descriptionForeground": "",
@esteedqueen
esteedqueen / fix_rbenv.md
Last active December 8, 2025 19:05
How to fix rbenv: version `x.x.x` is not installed

So, you just cloned an existing project's repo and you run bundle install but you got the error: rbenv: version x.x.x is not installed....

What the issue means? The project uses a specific ruby version that you do not have on your system.

Here's how to fix it:

  • Install the Ruby build for the specified version using:
rbenv install x.x.x
@stevecondylios
stevecondylios / contact-form-rails-6.md
Last active September 4, 2025 13:54
Create a Contact Form in Rails 6

How to make a contact form in rails 6

This is a quick walk through on how to:

  1. make a contact form in rails 6,
  2. test it locally, and
  3. move it into production using heroku and the MailGun addon

This uses the free heroku and mailgun plans. If you get stuck on any part, check the full code here.