在 Javascript 中动态创建数组
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Dynamically create an array in Javascript
提问by Lothar
I have an ajax request that returns some JSON formatted data. I'm building out a Google Maps display with it so I need to take that data and pass it to a few variables. So I want to build an array like:
我有一个 ajax 请求，它返回一些 JSON 格式的数据。我正在用它构建一个谷歌地图显示，所以我需要获取这些数据并将其传递给一些变量。所以我想构建一个数组，如：
var foo = [
['A Town', 32.844932, -50.886401, 1, setting1, '<div class="office"><div class="name">Smith</div><div class="location">111 Main Street<br /> Breen, MS<br /> 12345</div><div class="size">18 units<br />300 Foo</div><div class="thelink"><a href="#">Visit</a><br /><a href="#">Output</a></div></div>'],
['B Town', 33.844932, -51.886401, 2, setting1, '<div class="office"><div class="name">Jones</div><div class="location">112 Main Street<br /> Breen, MS<br /> 12345</div><div class="size">18 units<br />300 Foo</div><div class="thelink"><a href="#">Visit</a><br /><a href="#">Output</a></div></div>'],
[etc],
[etc]
];
That I can then use to render my google maps locations. I have the JSON data so how do I loop through it and build out such an array? Or is there a better way to do it that I am missing (which is what I suspect, lol)?
然后我可以用它来呈现我的谷歌地图位置。我有 JSON 数据，那么如何遍历它并构建这样的数组？或者有没有更好的方法来做到这一点，我错过了（这是我怀疑的，哈哈）？
回答by Skilldrick
Just do:
做就是了：
var foo = [];
for (/*loop*/) {
foo.push(['this is a new array', 'with dynamic stuff']);
}
回答by Robusto
In addition to Array.push(), you can also assign values directly to Array indices. For example,
除了 Array.push() 之外，您还可以直接为数组索引赋值。例如，
var foo = [];
foo[0] = "Foo 0";
foo[19] = "Bob";
This will give you a sparse array with a length of 20 and values in elements 0 and 19.
这将为您提供一个长度为 20 且元素为 0 和 19 的值的稀疏数组。
回答by Alex Wayne
You can use the pushfunction on Array objects to build them dynamically.
您可以push在 Array 对象上使用该函数来动态构建它们。
var a = [];
var b = [1,2,3,4,5,6,7,8,9];
for (var i=0; i<b.length; i++) {
a.push(b[i]);
}
