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@premek
premek / mv.sh
Last active Sep 30, 2020
Rename files in linux / bash using mv command without typing the full name two times
View mv.sh
# Put this function to your .bashrc file.
# Usage: mv oldfilename
# If you call mv without the second parameter it will prompt you to edit the filename on command line.
# Original mv is called when it's called with more than one argument.
# It's useful when you want to change just a few letters in a long name.
#
# Also see:
# - imv from renameutils
# - Ctrl-W Ctrl-Y Ctrl-Y (cut last word, paste, paste)
@sqren
sqren / eslint+prettier.MD
Last active Apr 16, 2018
ESLint + prettier setup
View eslint+prettier.MD

Install packages

yarn add eslint prettier eslint-{config,plugin}-prettier eslint-plugin-react  --dev --exact

package.json

{
  "scripts": {
@codediodeio
codediodeio / database.rules.json
Last active Oct 23, 2020
Common Database Rules for Firebase
View database.rules.json
// No Security
{
"rules": {
".read": true,
".write": true
}
}
@rgl
rgl / wait_for_http_200.sh
Last active Oct 24, 2020
Wait for an HTTP endpoint to return 200 OK with Bash and curl
View wait_for_http_200.sh
bash -c 'while [[ "$(curl -s -o /dev/null -w ''%{http_code}'' localhost:9000)" != "200" ]]; do sleep 5; done'
# also check https://gist.github.com/rgl/c2ba64b7e2a5a04d1eb65983995dce76
@gaearon
gaearon / connect.js
Last active Oct 20, 2020
connect.js explained
View connect.js
// connect() is a function that injects Redux-related props into your component.
// You can inject data and callbacks that change that data by dispatching actions.
function connect(mapStateToProps, mapDispatchToProps) {
// It lets us inject component as the last step so people can use it as a decorator.
// Generally you don't need to worry about it.
return function (WrappedComponent) {
// It returns a component
return class extends React.Component {
render() {
return (
@staltz
staltz / introrx.md
Last active Oct 25, 2020
The introduction to Reactive Programming you've been missing
View introrx.md
View ssh-agent-forwarding-screen.md

SSH agent forwarding and screen

When connecting to a remote server via SSH it is often convenient to use SSH agent forwarding so that you don't need a separate keypair on that server for connecting to further servers.

This is enabled by adding the

ForwardAgent yes

option to any of your Host entries in ~/.ssh/config (or alternatively with the -A option). Don't set this option in a wildcard Host * section since any user on the remote server that can bypass file permissions can now als use keys loaded in your SSH agent. So only use this with hosts you trust.

@hellerbarde
hellerbarde / latency.markdown
Created May 31, 2012 — forked from jboner/latency.txt
Latency numbers every programmer should know
View latency.markdown

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs
Read 1 MB sequentially from memory ..... 250,000 ns  = 250 µs
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