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// from: https://mp.weixin.qq.com/s/qxi_28ozTZqjLeJNlpR6rA
// 来自https://developer.mozilla.org/en-US/docs/Glossary/Base64#the_unicode_problem.
function base64ToBytes(base64) {
  const binString = atob(base64);
  return Uint8Array.from(binString, (m) => m.codePointAt(0));
}

// 来自https://developer.mozilla.org/en-US/docs/Glossary/Base64#the_unicode_problem.
function bytesToBase64(bytes) {
  const binString = String.fromCodePoint(...bytes);

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function loadScript(url, attributesParam, optsParam) {
  var attributes = attributesParam || {};
  // optional
  var opts = optsParam || {};

  var script = document.createElement('script');
  // default value
  if (attributes.defer === undefined) {
    attributes.defer = true;
  }

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function handleDuplicateLink(link) {
      if (!link) {
        console.warn('long link was empty');
        return link;
      }
      if (!link.includes('?')) {
        console.warn(`link(${link}) no need handle`);
        return link;
      }
      const links = link.split('?')

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function includeKey(objectA, objectB) {
  if (!objectA || !objectB) {
    return false;
  }
  const objectAKeys = Object.keys(objectA);
  const objectBKeys = Object.keys(objectB);
  if (!objectBKeys || !objectBKeys) {
    return false;
  }
  const _include = objectBKeys.some(objectBKey => {

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function copyArray(value) {
  return JSON.parse(JSON.stringify(value))
}

/**
 * @name isArrayEqual
 * @param {Array} arrayA 数组A
 * @param {Array} arrayB 数组B
 * @description 比较两个数组，内容可以顺序不一致
 * @returns

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// http://js.jsrun.net/ScLKp/edit
class EventBus {
  constructor() {
    /**
     * 构造函数需要存储的 event 事件
     */
    this.events = this.events || new Object();
  }
}

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function isInChina(cb) {
    return new Promise((resolve, reject) => {
        try {
            let url = "//graph.facebook.com/feed?callback=h"
            let xhr = new XMLHttpRequest()
            let called = false
            xhr.open("GET", url)
            xhr.onreadystatechange = function() {
                if (xhr.readyState === 4 && xhr.status === 200) {
                    called = true

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var setContextOption = (newCtx, {
  smoothEnabled = true,
  smoothQuality = 'high'
} = {}) => {
  newCtx.imageSmoothingEnabled = smoothEnabled // 图片平滑, 默认为 true
  newCtx.msImageSmoothingEnabled = smoothEnabled
  newCtx.webkitImageSmoothingEnabled = smoothEnabled
  newCtx.mozImageSmoothingEnabled = smoothEnabled
  newCtx.imageSmoothingQuality = smoothQuality // 调整平滑质量
  newCtx.msImageSmoothingQuality = smoothQuality

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/*!
 * gulp
 * $ npm install gulp-ruby-sass gulp-autoprefixer gulp-cssnano gulp-jshint gulp-concat gulp-uglify gulp-imagemin gulp-notify gulp-rename gulp-livereload gulp-cache del --save-dev
 */

// Load plugins
var gulp = require('gulp'),
    sass = require('gulp-ruby-sass'),
    autoprefixer = require('gulp-autoprefixer'),
    cssnano = require('gulp-cssnano'),

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var gulp   = require('gulp');
var uglify = require('gulp-uglify');
var concat = require('gulp-concat');
var bower  = require('main-bower-files');

gulp.task('bower', function () {
  return gulp.src(bower())
    .pipe(concat('vendor.js'))
    .pipe(uglify())
    .pipe(gulp.dest('/build/scripts'));