使用Jquery / JS从JSON检索对象

Question

1. I have a JSON file at /path/to/json containing:

    {"a": {"s": [{"l": "PPP"}]}} 

   I'm using this JQuery expression:

    $.ajax({ url: '/path/to/json', dataType: 'json', async: false, success: function(data) { $.each(data.as, function(index,element) { lines=element.l; }) } }); 

   How do I return the value at asl without using $.each()?

2. I have another JSON file containing:

    {"a": {"s": [ { "l": "PPP", "qqq": "aaa" }, { "l": "FFF", "qqq": "bbb" } ]}} 

   This is a file. How do I assign the contents of the file to a variable then search within this json for the object who's 'l' attribute is 'PPP' then retrieve that object's 'qqq' value?

Answer 1

You can use the array index, if you know the index of item to be fetched

To get the first item in the s array

data.a.s[0].l

To get the second item in the s array

data.a.s[1].l

Or use a for loop

for(var i= 0; i<data.a.s.length; i++){
    lines = data.a.s[i].l
}