joseluisq

// Array literal (= []) is faster than Array constructor (new Array())
// http://jsperf.com/new-array-vs-literal/15
var array = [];

// Object literal (={}) is faster than Object constructor (new Object())
// http://jsperf.com/new-array-vs-literal/26
var obj = {};

// property === undefined is faster than hasOwnProperty(property)
// Note: don't use this in cases where 'undefined' is a possible value for your properties

joseluisq

MacOS + iTerm2 shotcuts

Some custom useful shortcuts when I use MacOS + iTerm2.

iTerm2

* Configure your shortcuts as screenshot above.

Shortcuts:

joseluisq

RxJS 6 Changes

Source: https://www.academind.com/learn/javascript/rxjs-6-what-changed/

The following operators were renamed:

• catch() => catchError()
• do() => tap()
• finally() => finalize()
• switch() => switchAll()

joseluisq

const factorial = n => n > 1 ? n * factorial(n - 1) : 1

factorial(6)
// 720


// function factorial (n) {
//	var total = 1

// 	for (i = 1; i <= n; i++) {

joseluisq

*.~
**/*.gz
**/*.tar
**/*.tgz
**/*.log
**/*.env
**/*.zip
**/*.map
**/*cache
**/.DS_Store

joseluisq

sudo pacman -S archlinux-keyring

source: https://www.ostechnix.com/fix-invalid-corrupted-package-pgp-signature-error-arch-linux/

joseluisq

var Benchmark = require('benchmark');
var expect = require('expect');
var suite = new Benchmark.Suite;

var testArray = [1,2,3,4,5,6,7,8,9,10,11,12,13];
var resultat = [2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26];

suite
    .add('forHoley', () => forHoley(testArray))
    .add('forPush', () => forPush(testArray))

joseluisq

const env = (key) => process.env[key] || null

const debug = (obj) => console.dir(obj, { colors: true })

const validator = (vlist = []) => {
  const errors = []

  vlist.forEach(v => {
    if (!env(v)) errors.push(`No '${v}' supplied!`, v)
  })

joseluisq

/**
 * Convert a mixed value into a boolean
 *
 * @param {string|number|object} value
 * @returns {boolean}
 */
function toBoolean (value) {
  if (!value) return false
  if (typeof value === 'boolean') return value

joseluisq

time gocloc --not-match-d="(node_modules)" --include-lang=JavaScript .