用数组作为值对JavaScript对象进行排序

Question

I have a Javascript Object in the format key:pair where the pair is an array containing 2 timestamp values. I would like to sort this object so that the elements with the lowest numbers (earliest times) are displayed first.

Here is an example of the object: {"21_2":[1409158800,1409160000],"20_1":[1409148000,1409149200],"56_1":[1409149800,1409151600]}

So in this case, I would want the final sorted object to read:

{"20_1":[1409148000,1409149200],"56_1":[1409149800,1409151600],"21_2":[1409158800,1409160000]}

Obviously the sort() function will come into play here for the arrays, but how do I access those values inside the object? Note the object key isn't actually an integer because of the underscore.

I have found this: Sort Complex Array of Arrays by value within but haven't been able to apply it to my situation. Any help would be greatly appreciated.

Answer 1

You could change the structure of your data like this:

var myArray = [{
        "id" : "21_2" // id or whatever these are
        "timeStamps" : [1409158800,1409160000]
    }, {
        "id" : "20_1"
        "timeStamps" : [1409148000,1409149200]
    }];

Then you could sort it by the regular array sort:

myArray.sort(function(a, b){
    // however you want to compare them:
    return a.timeStamps[0] - b.timeStamps[0]; 
});