Question

Suppose I have an array of objects like this:

 var nodes = [{"size":8,"name":"myName"},{"size":10,"name":"otherName"},{"size":11,"name":"userName"}];

How do I create an array arr that contains objects mapped from nodes but that the attributes have different names. Say I want that arr.r be mapped to each size attribute, so:

thisSize = arr[0].r

should assing 8 to thisSize.
Hope I explained my question clearly.

Answer 1

You can use properties or map if you’re not worried about supporting Internet Explorer 8 and earlier, but I’ll assume you are. Just iterate and construct a new array with new objects:

var arr = [];

for(var i = 0; i < nodes.length; i++) {
    var node = nodes[i];

    arr.push({
        r: node.size
    });
}

Map your properties in the object pushed as necessary.