如何将键和值都推送到 Jquery 中的数组中
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How to push both key and value into an Array in Jquery
提问by KillerFish
I am reading RSS feedand pushing both Title and Link into an Array in Jquery.
我正在阅读RSS 提要并将 Title 和 Link 都推送到Jquery 中的一个数组中。
What i did is
我所做的是
var arr = [];
$.getJSON("displayjson.php",function(data){
$.each(data.news, function(i,news){
var title = news.title;
var link = news.link;
arr.push({title : link});
});
});
And i am reading that array again using
我正在使用该数组再次读取该数组
$('#show').click(function(){
$.each(arr, function(index, value){
alert( index +' : '+value);
});
});
But it Giving me Outputas
但它给我的输出为
1:[Object Object]
2:[Object Object]
3:[Object Object]
like this ...
像这样 ...
How i can get both tileand linkas a pair ( title as key and link as value)
我如何将磁贴和链接作为一对（标题作为键和链接作为值）
回答by Tomalak
There are no keys in JavaScript arrays. Use objects for that purpose.
JavaScript 数组中没有键。为此目的使用对象。
var obj = {};
$.getJSON("displayjson.php",function (data) {
$.each(data.news, function (i, news) {
obj[news.title] = news.link;
});
});
// later:
$.each(obj, function (index, value) {
alert( index + ' : ' + value );
});
In JavaScript, objects fulfill the role of associative arrays. Be aware that objects do not have a defined "sort order" when iterating them (see below).
在 JavaScript 中，对象扮演关联数组的角色。请注意，对象在迭代时没有定义的“排序顺序”（见下文）。
However, In your case it is not really clear to me why you transfer data from the original object (data.news) at all. Why do you not simply pass a reference to thatobject around?
但是，在您的情况下，我不太清楚您为什么要从原始对象 ( data.news)传输数据。为什么不简单地传递对该对象的引用？
You can combine objects and arrays to achieve predictable iteration andkey/value behavior:
您可以组合对象和数组来实现可预测的迭代和键/值行为：
var arr = [];
$.getJSON("displayjson.php",function (data) {
$.each(data.news, function (i, news) {
arr.push({
title: news.title,
link: news.link
});
});
});
// later:
$.each(arr, function (index, value) {
alert( value.title + ' : ' + value.link );
});
回答by 6502
This code
这段代码
var title = news.title;
var link = news.link;
arr.push({title : link});
is not doing what you think it does. What gets pushed is a new object with a single member named "title" and with linkas the value ... the actual titlevalue is not used.
To save an object with two fields you have to do something like
不是在做你认为它会做的事情。被推送的是一个新对象，它有一个名为“title”的成员，并且link作为值......title不使用实际值。要保存具有两个字段的对象，您必须执行以下操作
arr.push({title:title, link:link});
or with recent Javascript advances you can use the shortcut
或者随着最近 Javascript 的进步，您可以使用快捷方式
arr.push({title, link}); // Note: comma "," and not colon ":"
The closest thing to a python tuple would instead be
最接近 python 元组的东西是
arr.push([title, link]);
Once you have your objects or arrays in the arrarray you can get the values either as value.titleand value.linkor, in case of the pushed array version, as value[0], value[1].
一旦您在数组中拥有对象或数组，arr您就可以获取值 asvalue.title和value.link或者，如果是推送的数组版本，则为 as value[0], value[1]。
回答by deceze
arr[title] = link;
You're not pushinginto the array, you're setting the element with the key titleto the value link. As such your array should be an object.
您没有推入数组，而是将键title设置为 value的元素link。因此，您的数组应该是一个对象。
回答by Jaydeep Patel
I think you need to define an object and then push in array
我认为你需要定义一个对象然后推入数组
var obj = {};
obj[name] = val;
ary.push(obj);
回答by Cody
You might mean this:
你可能是这个意思：
var unEnumeratedArray = [];
var wtfObject = {
key : 'val',
0 : (undefined = 'Look, I\'m defined'),
'new' : 'keyword',
'{!}' : 'use bracket syntax',
' ': '8 spaces'
};
for(var key in wtfObject){
unEnumeratedArray[key] = wtfObject[key];
}
console.log('HAS KEYS PER VALUE NOW:', unEnumeratedArray, unEnumeratedArray[0],
unEnumeratedArray.key, unEnumeratedArray['new'],
unEnumeratedArray['{!}'], unEnumeratedArray[' ']);
You can set an enumerable for an Object like: ({})[0] = 'txt';and you can set a key for an Array like: ([])['myKey'] = 'myVal';
您可以为 Object 设置一个 enumerable like:({})[0] = 'txt';并且您可以为 Array 设置一个键，例如：([])['myKey'] = 'myVal';
Hope this helps :)
希望这可以帮助 ：）
