Javascript foreach for JSON 数组，语法
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foreach for JSON array , syntax
提问by David
my script is getting some array from php server side script.
我的脚本正在从 php 服务器端脚本获取一些数组。
result = jQuery.parseJSON(result);
now I want to check each variable of the array.
现在我想检查数组的每个变量。
if (result.a!='') { something.... }
if (result.b!='') { something.... }
....
Is there any better way to make it quick like in php 'foreach' , 'while' or smth ?
有没有更好的方法让它像在 php 'foreach' 、 'while' 或 smth 中一样快速？
UPDATE
更新
This code ( thanks to hvgotcodes ) gives me values of variables inside the array but how can I get the names of variables also ?
这段代码（感谢 hvgotcodes）为我提供了数组中变量的值，但我怎样才能获得变量的名称呢？
for(var k in result) {
alert(result[k]);
}
UPDATE 2
更新 2
This is how php side works
这就是 php 端的工作方式
$json = json_encode(array("a" => "test", "b" => "test", "c" => "test", "d" => "test"));
回答by hvgotcodes
You can do something like
你可以做类似的事情
for(var k in result) {
console.log(k, result[k]);
}
which loops over all the keys in the returned json and prints the values. However, if you have a nested structure, you will need to use
它遍历返回的 json 中的所有键并打印值。但是，如果您有嵌套结构，则需要使用
typeof result[k] === "object"
to determine if you have to loop over the nested objects. Most APIs I have used, the developers know the structure of what is being returned, so this is unnecessary. However, I suppose it's possible that this expectation is not good for all cases.
以确定是否必须遍历嵌套对象。我使用过的大多数 API，开发人员都知道返回内容的结构，所以这是不必要的。但是，我认为这种期望可能不适用于所有情况。
回答by Hari Pachuveetil
Try this:
尝试这个：
$.each(result,function(index, value){
console.log('My array has at position ' + index + ', this value: ' + value);
});
回答by Tamzin Blake
Sure, you can use JS's foreach.
当然，你可以使用 JS 的 foreach。
for (var k in result) {
something(result[k])
}
回答by yogihosting
You can use the .forEach() method of JavaScript for looping through JSON.
您可以使用 JavaScript 的 .forEach() 方法循环 JSON。
var datesBooking = [
{"date": "04\/24\/2018"},
{"date": "04\/25\/2018"}
];
datesBooking.forEach(function(data, index) {
console.log(data);
});