Group by/order by On JSON data using javascript/jquery

Question

I have a JSON data and I need to do something like group by and i asked this question before here but i am not getting any satisfied answer so this time i would like to expl

Answer 1

There is no built-in "group by" or "order by" in Javascript for this scenario. You're going to have to do this manually. Something like this might help:

var groups = myObject.Apps[0].groups;
var authors = {};
var authorNames = [];

for(var i = 0; i < groups.length; i++) {
    var group = groups[i];    

    if(typeof authors[group.author] === "undefined") {
        authors[group.author] = [];
        authorNames.push(group.author);
        authorNames.sort();
    }

    authors[group.author].push({
        id: group.id,
        name: group.name,
        category: group.category
    });       
}

Usually in associative arrays you don't really care about the order of the keys and while iterating the order is usually not guaranteed. What I'm doing here is maintaining a separate array of names in sorted order. I can then iterate over that array and use those values to grab the associated object out of the associative array.

Check out the fiddle.