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ZSH CheatSheet

This is a cheat sheet for how to perform various actions to ZSH, which can be tricky to find on the web as the syntax is not intuitive and it is generally not very well-documented.

Strings

Description Syntax
Get the length of a string ${#VARNAME}
Get a single character ${VARNAME[index]}
@simonw
simonw / json-objects-into-a-datasette.md
Last active November 11, 2023 17:42
How to turn a list of JSON objects into a Datasette

How to turn a list of JSON objects into a Datasette

This repository has a dataset of 184.879 crimes committed in Buenos Aires: https://github.com/ramadis/delitos-caba

Download the raw data like this:

wget 'https://github.com/ramadis/delitos-caba/releases/download/3.0/delitos.json'

Now use Pandas to load that into a dataframe:

@yancyn
yancyn / git-svn.md
Last active March 2, 2025 18:05
Migrate Archive Google Code SVN to Git

Migrate Archive Google Code SVN to Git

Requirements

  • git
  • git-svn

Setup¹

$ sudo apt-get install git
$ sudo add-apt-repository ppa:git-core/ppa
@Faheetah
Faheetah / Jenkinsfile.groovy
Last active April 25, 2025 15:35
Jenkinsfile idiosynchrasies with escaping and quotes
node {
echo 'Results included as an inline comment exactly how they are returned as of Jenkins 2.121, with $BUILD_NUMBER = 1'
echo 'No quotes, pipeline command in single quotes'
sh 'echo $BUILD_NUMBER' // 1
echo 'Double quotes are silently dropped'
sh 'echo "$BUILD_NUMBER"' // 1
echo 'Even escaped with a single backslash they are dropped'
sh 'echo \"$BUILD_NUMBER\"' // 1
echo 'Using two backslashes, the quotes are preserved'
sh 'echo \\"$BUILD_NUMBER\\"' // "1"

Comparison of configuration file languages

We need to PEPify a static format for writing down bootstrap information in Python source trees. The initial target is a list of PEP 508 package requirement strings. It's possible that in the future we might want to add more features like a build system backend specification (as in PEPs 516, 517), or an extension namespace feature to allow third-party developer tools (flit, pytest, coverage, flake8, etc.) to consolidate their configuration in this file in a systematic

@piscisaureus
piscisaureus / pr.md
Created August 13, 2012 16:12
Checkout github pull requests locally

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = [email protected]:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this: