rauschma

Cheat sheet: JavaScript Array methods

Deriving a new Array from an existing Array:

['■','●','▲'].slice(1, 3)          ⟼ ['●','▲']
['■','●','■'].filter(x => x==='■') ⟼ ['■','■']
    ['▲','●'].map(x => x+x)        ⟼ ['▲▲','●●']
    ['▲','●'].flatMap(x => [x,x])  ⟼ ['▲','▲','●','●']

dino-

Haskell symbols

When starting out with Haskell, I found it difficult to read a lot of the symbols. I made this document explaining the names of some symbols and how I read them.

:: "has type"

x :: Int

domenic

Auto-deploying built products to gh-pages with GitHub Actions

This is a set up for projects which want to check in only their source files, but have their gh-pages branch automatically updated with some compiled output every time they push.

A file below this one contains the steps for doing this with Travis CI. However, these days I recommend GitHub Actions, for the following reasons:

• It is much easier and requires less steps, because you are already authenticated with GitHub, so you don't need to share secret keys across services like you do when coordinate Travis CI and GitHub.
• It is free, with no quotas.
• Anecdotally, builds are much faster with GitHub Actions than with Travis CI, especially in terms of time spent waiting for a builder.

tkrynski

Install Redis RDB Tools from here:

https://github.com/sripathikrishnan/redis-rdb-tools

Take a snapshot of each redis db $ redis-cli save

Copy the snapshots to somewhere else $ cp ~/dump.rdb ./dump-a.rdb

sukima

(function(settings, libraries) {
  localStorage.setItem('settings', JSON.stringify(settings));
  localStorage.setItem('libraries', JSON.stringify(libraries));
  setTimeout(function() {
    window.location = window.location; // Force refresh
  }, 0);
})(
//Settings
{
  "panels": [

laszlomiklosik

git checkout HEAD path/to/file

# Without HEAD it's not working because the file is not there anymore