huozhi

const readOnDrop = (element, onRead) => {
  element.addEventListener('dragover', ev => ev.preventDefault())
  element.addEventListener('drop', ev => {
    ev.preventDefault()
    const dt = ev.dataTransfer
    const file = dt.files[0]
    const reader = new FileReader()
    reader.onload = event => onRead(event.target.result)
    reader.readAsText(file)
  })

huozhi

openssl req -newkey rsa:2048 -new -nodes -x509 -days 3650 -keyout key.pem -out cert.pem
# only enter the Common Name: your ip address or your domain name

huozhi

// https://stackoverflow.com/questions/6274339/how-can-i-shuffle-an-array/6274381#6274381
/**
 * Shuffles array in place. ES6 version
 * @param {Array} a items The array containing the items.
 */
function shuffle(a) {
    for (let i = a.length; i; i--) {
        let j = Math.floor(Math.random() * i);
        [a[i - 1], a[j]] = [a[j], a[i - 1]];
    }

huozhi

function formatTime(seconds, format) {
  var values = {
    h: Math.floor(seconds / 3600),
    m: Math.floor(seconds % 3600 / 60),
    s: Math.round(seconds % 60),
  }

  var type
  var value
  return format.split(':')

huozhi

git log --all --decorate --oneline --graph

huozhi

/**
 * https://github.com/react-bootstrap/react-bootstrap/blob/master/src/utils/createChainedFunction.js
 * Safe chained function
 *
 * Will only create a new function if needed,
 * otherwise will pass back existing functions or null.
 */
export function chainFunctions(...funcs) {
  return funcs
    .filter(f => f != null)

huozhi

var isNumber = (val) => /[0-9]/.test(val)
var isAlpha = (val) => /[a-z]/.test(val)
var isEmpty = (arr) => arr.length === 0
var top = (stack) => stack[stack.length - 1]

var calculate = function(str) {
  var i = 0
  var snum = []
  var sop = []

huozhi

export const dataURItoBlob = (dataURI) => {
  // convert base64/URLEncoded data component to raw binary data held in a string
  let byteString
  if (dataURI.split(',')[0].indexOf('base64') >= 0) {
    byteString = atob(dataURI.split(',')[1])
  } else {
    byteString = unescape(dataURI.split(',')[1])
  }
  // separate out the mime component
  const mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0]

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export const onPasetImage = (event, onLoadImageDataURI) => {
  const items = (event.clipboardData || event.originalEvent.clipboardData).items
  for (let index in items) {
    const item = items[index]
    if (item.kind === 'file') {
      const blob = item.getAsFile()
      const reader = new FileReader()
      reader.onload = (event) => {
        onLoadImageDataURI(event.target.result)
      }

huozhi

#/bin/bash

stat -f "%OLp %N" $@