初始化JavaScript数组 [英] Initializing a javascript array
本文介绍了初始化JavaScript数组的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
有另一种（更漂亮）的方式来初始化这个JavaScript数组？
VAR计数器= [];
计数器[A] = 0;
计数器[B] = 0;
计数器[C] = 0;
计数器[D] = 0;
计数器[E] = 0;
计数器[F] = 0;
计数器[G] = 0;
解决方案
一个。那也不行，或者至少不是办法，你会希望它。您初始化什么时候你最有可能寻找的是一个散列的数组。 计数仍然会返回 [] 并 0 除非你改变的第一行计数器= {}; 。该属性将存在，但它是一个令人困惑的使用 [] 来存储键 - 值对。
A：
VAR计数器= {A：0，B：0 C：0 D：0 E：0，F：0，G：0};
Is there another (more beautiful) way to initialize this Javascript array?
var counter = [];
counter["A"] = 0;
counter["B"] = 0;
counter["C"] = 0;
counter["D"] = 0;
counter["E"] = 0;
counter["F"] = 0;
counter["G"] = 0;
解决方案
A. That doesn't work, or at least not the way you'd hope it to. You initialized an array when what you're most likely looking for is a hash. counter will still return [] and have a length of 0 unless you change the first line to counter = {};. The properties will exist, but it's a confusing use of [] to store key-value pairs.
B:
var counter = {A: 0, B: 0, C: 0, D: 0, E: 0, F: 0, G: 0};
这篇关于初始化JavaScript数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
