As much as I write about MooTools on my blog, I spend most of my work day knee-deep in PHP. As you probably know, one way to get the size of an array in PHP is to use the count() function:
正如我在博客上撰写有关MooTools的文章一样，我大部分时间都是在PHP上度过的。 您可能知道，在PHP中获取数组大小的一种方法是使用count()函数：
echo count($my_array);In JavaScript, the way to get the size of an array is to use the length property, like this:
在JavaScript中，获取数组大小的方法是使用length属性，如下所示：
alert(my_array.length);For some reason, I absolutely hate the ".length" way of retrieving the length of an array. For this reason, I've implement the count() method into JavaScript:
由于某种原因，我绝对讨厌检索数组长度的“ .length”方法。 因此，我将count()方法实现到JavaScript中：
Array.prototype.count = function() { return this.length; };The count() habit is difficult to break, so why try?
count()习惯很难打破，那么为什么要尝试呢？
翻译自: https://davidwalsh.name/implementing-array-count-method-javascript
相关资源：数值动画效果countUp.js.zip