gistfile1.txt

function parseTree(arr, parent, tree) {
    var children = arr.filter(function (child) {
        return child.parent === parent.name;
    });
    arr = arr.filter(function (child) {
        var check = true;
        for( var i = 0; i < children.length; i++ ) {
            if( child === children[i] ) {
                check = false;
            }
        }
        return check;
    });
    if (children.length) {
        if (parent.name === 'null') {
            tree = children;
        } else {
            parent.children = children;
        }
    }
    children.forEach(function (child) {
        parseTree(arr, child);
    });
    return tree;
}