jQuery 在 JSON 数组中搜索字符串并检索包含它作为值的对象
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/16946632/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Search JSON Array for a String and Retrieve Object that Contains it as a Value
提问by ac360
My JSON is below. It contains two Objects, each with a few key value pairs. How can I search through the entire JSON array and pull the object that contains a particular string as a value?
我的 JSON 在下面。它包含两个对象，每个对象都有几个键值对。如何搜索整个 JSON 数组并将包含特定字符串的对象作为值提取？
In this case, I need to pull the object with the coupon_code: COUPON1, so that I can then pull the ID of that Coupon.
在这种情况下，我需要使用coupon_code：COUPON1拉取对象，以便我可以拉取该Coupon的ID。
In short, I just need to get the id of the Coupon with coupon_code: COUPON1
简而言之，我只需要使用coupon_code获取Coupon的id：COUPON1
[Object, Object]
0: Object
coupon_code: "COUPON1"
created_at: "2013-06-04T13:50:20Z"
deal_program_id: 1
id: 7
updated_at: "2013-06-04T13:50:20Z"
__proto__: Object
1: Object
coupon_code: "COUPON3"
created_at: "2013-06-04T15:47:14Z"
deal_program_id: 1
id: 8
updated_at: "2013-06-04T15:47:14Z"
Thanks :)
谢谢 ：）
回答by T.J. Crowder
You just loop through the array and look. There are lots of ways to do that in JavaScript.
您只需遍历数组并查看即可。在 JavaScript 中有很多方法可以做到这一点。
E.g.:
例如：
var a = /*...your array...*/;
var index = 0;
var found;
var entry;
for (index = 0; index < a.length; ++index) {
entry = a[index];
if (entry.coupon_code == "COUPON1") {
found = entry;
break;
}
}
Or using ES5's Array#somemethod (which is one that can be "shimmed" for browsers that don't yet have it, search for "es5 shim"):
或者使用 ES5 的Array#some方法（对于还没有它的浏览器，可以“填充”一种方法，搜索“es5 shim”）：
var a = /*...your array...*/;
var found;
a.some(function(entry) {
if (entry.coupon_code == "COUPON1") {
found = entry;
return true;
}
});
回答by HBP
Write a generic find function :
编写一个通用的查找函数：
function find (arr, key, val) { // Find array element which has a key value of val
for (var ai, i = arr.length; i--;)
if ((ai = arr[i]) && ai[key] == val)
return ai;
return null;
}
Call as follows :
调用如下：
find (arr, 'coupon_code', 'COUPON1')
回答by RienNeVaPlu?s
var result = null;
Objects.forEach(function(obj, i){
if(obj.cupon_code == 'COUPON1'){
return result = obj;
}
});
console.log(result);
This will loop through your Arrayand check the coupon_codefor your specified value. If it found something, it will return it in result.
这将遍历您的Array并检查coupon_code您指定的值。如果它找到了一些东西，它会在result.
Note that Array.forEachis available since JavaScript 1.6. You might want to take a look at which browser are supportingit.
请注意Array.forEach从 JavaScript 1.6 开始可用。您可能想看看支持它的浏览器。
