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function shuffle(list) {
  var i = list.length;

  while (--i) {
    var j = Math.floor(Math.random() * (i + 1));
    if (i == j) continue;
    var k = list[i];
    list[i] = list[j];
    list[j] = k;
  }

yuheiy

import React    from 'react';
import dynamics from 'dynamics.js';

class Box extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      x: 0,
      y: 0
    };

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var users = [
  { name: 'tom', age: 18 },
  { name: 'bob', age: 24 },
  { name: 'john', age: 36 }
];

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<dl>
  <dt>name</dt>
  <dd>tom</dd>
  <dt>age</dt>
  <dd>18</dd>
</dl>

<dl>
  <dt>name</dt>
  <dd>bob</dd>

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var frag = document.createDocumentFragment();

for (var i = 0, l = users.length; i < l; i++) {
  var user = users[i];
  var dl = document.createElement('dl');

  var nameTerm = document.createElement('dt');
  nameTerm.textContent = 'name';
  dl.appendChild(nameTerm);

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var html = users.map(function (user) {
  return `
    <dl>
      <dt>name</dt>
      <dd>${user.name}</dd>
      <dt>age</dt>
      <dd>${user.age}</dd>
    </dl>
  `;
});

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var empty = function (el) {
  while (el.firstChild) {
    el.removeChild(el.firstChild);
  }
};

var container = document.getElementById('container');
empty(container);

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$(function () {
  var $field = $('#field');
  var $btn = $('#btn');
  var $list = $('#list');

  var addItem = function () {
    var text = $field.val();
    $list.append('<li>' + text + '</li>');
    $field.val('');
  };

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<?php
pathinfo($filename, PATHINFO_EXTENSION);

yuheiy

<?php
$finfo = new finfo(FILEINFO_MIME_TYPE);
$finfo->file($filepath);