如何将键和值都推送到 Jquery 中的数组中

发布于01月28日

我正在阅读RSS feed篇文章，并将标题和链接放入Jquery的数组中.

What i did is

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});
                });                      
            });

我正在使用以下命令再次读取该数组

$('#show').click(function(){
                $.each(arr, function(index, value){
                    alert( index +' : '+value);
                });
            });

But it Giving me Output as

1:[Object Object]
2:[Object Object]
3:[Object Object]

like this ...

如何将tile和link作为一对(title as key and link as value)

推荐答案

There are no keys in JavaScript arrays. Use objects for that purpose.

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).

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 that object around?

You can combine objects and arrays to achieve predictable iteration and key/value behavior:

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 );
});