将数组推入 Javascript (jQuery) 中的数组
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Push array into array in Javascript (jQuery)
提问by rodd
I've been trying to get the push() method on a loop to build a structure as follows:
我一直在尝试在循环中使用 push() 方法来构建如下结构：
var locations2 = [
['User', position.coords.latitude, position.coords.longitude, 1],
['Bondi Beach', -33.890542, 151.274856, 2],
['Coogee Beach', -33.923036, 151.259052, 3],
['Cronulla Beach', -34.028249, 151.157507, 4],
['Manly Beach', -33.80010128657071, 151.28747820854187, 5],
['Maroubra Beach', -33.950198, 151.259302, 6]
];
This is my code:
这是我的代码：
var locations = [];
$.ajax({
type: "POST",
url: "/ajax/map.php",
data: "name=test",
dataType: "json",
cache: false,
success: function(data){
$.each(data.points, function(i,item){
array_push = ["test", parseFloat(item.origem_lat), parseFloat(item.origem_lng), i];
locations.push(array_push);
});
}
});
However, the Javascript console.log for locations shows an empty array.
但是，位置的 Javascript console.log 显示一个空数组。
I have tried to use push() in many different ways, but I cannot get the same structure as locations2. The biggest problem here is that I do not know how many arrays are going to be inside the locations array before the loop, so I can't initialize it beforehand.
我尝试以多种不同的方式使用 push()，但无法获得与locations2 相同的结构。这里最大的问题是我不知道在循环之前位置数组中有多少个数组，所以我不能事先初始化它。
Any thoughts?
有什么想法吗？
采纳答案by rodd
I figured out what the problem is. It has nothing to do with the push() method itself. Apparently ajax calls are not executed in sequential order (that's the reason it's asynchronous). I added async: falsein the ajax call options and now everything works perfectly.
我想出了问题所在。它与 push() 方法本身无关。显然 ajax 调用不是按顺序执行的（这就是它异步的原因）。我在 ajax 调用选项中添加了async: false，现在一切正常。
Thanks everyone for the input.
感谢大家的投入。
