Lokua

  const originalError = console.error
  
  beforeAll(() => {
    jest.spyOn(console, 'error').mockImplementation((...args) => {
      if (
        typeof args[0] === 'string' &&
        args[0].includes('inside a test was not wrapped in act')
      ) {
        return
      }

Lokua

convert series of images to gif

fmpeg -f image2 -framerate 2 -i %2d.jpg out.gif

convert series of images to mp4 (suitable for instagram, quicktime)

ffmpeg -f image2 -framerate 2 -i %2d.jpg -pix_fmt yuv420p -crf 17 -vcodec libx264 out.mp4

Lokua

export const mockLocation = value =>
  Object.defineProperties(window, {
    location: {
      value,
      writable: true,
    },
  })

export const mockPathname = pathname =>
  mockLocation({

Lokua

import { dirname } from 'path'
import { fileURLToPath } from 'url'

export const getDirname = (importMetaUrl) =>
  dirname(fileURLToPath(importMetaUrl))

// use as `getDirname(import.meta.url)`

Lokua

{
  "scripts": {
    "test": "node ./path-to/test-runner.mjs"
  }
}

Lokua

#! /bin/bash

find . -name 'node_modules' -type d -prune -exec rm -rf '{}' +

Lokua

#!/bin/bash

function wav2mp3() {
  for filename in *.wav; do
    echo wav2mp3: converting $filename
    mp3_filename="${filename[@]/%wav/mp3}"
    lame --preset insane "$filename" "$mp3_filename"
    echo wav2mp3: finished converting $filename
    echo
  done

Lokua

const { spawn } = require('child_process')
const chokidar = require('chokidar')
const chalk = require('chalk')

const paths = ['./src/main.js']

let child
let wait = false

spawnElectron()

Lokua

const rotate = (array, n) => [
  ...array.slice(array.length - n),
  ...array.slice(0, array.length - n),
]

Lokua

export function isEventWithin(e, element) {
  const rect = element.getBoundingClientRect()
  
  return (
    rect.top <= e.clientY &&
    e.clientY <= rect.top + rect.height &&
    rect.left <= e.clientX &&
    e.clientX <= rect.left + rect.width
  )
}