javascript数组作为关联数组中的值

Question

我正在尝试像这样动态地构建一个关联的数组。 我如何构建它？ 具有以下预期输出？

“快乐”：[1,2,3,4,5]，“愤怒”：[6,7,8,9,10]

$(document).ready(function() {
var videos = [];

$('.header-video__media').each(function(i, elem) {
  var mediaElement = $(elem);
  var mood = mediaElement.attr('data-mood');
  headerVideo = new HeaderVideo({
    index:i,
    element: '.header-video',
    media: '.header-video__media',
    playTrigger: '.header-video__play-trigger',
    closeTrigger: '.header-video__close-trigger',
    nextTrigger: '.header-video__next-trigger'
  });
  videos.mood = mood;
  videos.push (headerVideo);
});

Answer 1

在 JavaScript 世界中，关联数组由文字对象表示：

// declaration of a new literal object
var videos = {};

// test if the key is already setted or not
if(!videos.hasOwnProperty(mood)){
   // if not, initiate a new array 
   videos[mood] = [headerVideo];
}else{
   // if yes, add add the value to the existing array 
   videos[mood].push(headerVideo);
}