Skip to content

Instantly share code, notes, and snippets.

@getify
getify / 1.md
Last active October 15, 2020 01:44
BetterPromise: a strawman experiment in subclassing Promise and "fixing" a bunch of its awkward/bad parts

Some things that are "better" with this BetterPromise implementation:

  • BetterPromise # then(..) accepts a BetterPromise (or Promise) instance passed directly, instead of requiring a function to return it, so that the promise is linked into the chain.

    var p = BetterPromise.resolve(42);
    
    var q = Promise.resolve(10);
    
    p.then(console.log).then(q).then(console.log);

Strings

String.prototype.*

None of the string methods modify this – they always return fresh strings.

  • charAt(pos: number): string ES1

    Returns the character at index pos, as a string (JavaScript does not have a datatype for characters). str[i] is equivalent to str.charAt(i) and more concise (caveat: may not work on old engines).

@renatorib
renatorib / operator_with_ligatures.md
Last active January 11, 2024 06:45
Using Operator Mono with Fira Code ligatures in Atom.

Using Operator Mono with Fira Code ligatures in Atom.

  1. Open your Atom's Stylesheet
    image

  2. Put this css

atom-text-editor {
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
@knowbody
knowbody / ex-navigation.md
Last active July 17, 2023 10:14
My exponent's ex-navigation docs/thoughts

Exponent - ex-navigation

This is for now, for my personal use only, things might not be correctly explained here. For the official docs please check: https://github.com/exponentjs/ex-navigation/blob/master/README.md

Navigation bar configuration

On every screen you can use the built-in navigation bar, you can add a title, left button, right button or change navigation bar’s style. All you need to do is pass appropriate params to navigationBar in the route configuration:

import React, { Component } from 'react';
@gunjanpatel
gunjanpatel / revert-a-commit.md
Last active May 3, 2024 20:50
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:

@tianchaijz
tianchaijz / tips_lsof.sh
Last active January 24, 2022 02:41 — forked from sergepetit/tips_lsof.sh
Shell command lsof : see open files and ports; Selection is OR by default, use -a for AND; Tested on OSX
#list all ports for tcp
sudo lsof -itcp
#find all things listening on ports
lsof -Pnl +M -i4 | grep LISTEN
#all ports for tcp, dont resolve port name from numbers
sudo lsof -itcp -P
#open files and ports of process #$PID
@staltz
staltz / introrx.md
Last active May 6, 2024 01:44
The introduction to Reactive Programming you've been missing