helper

mapper.js

// (obj, ['a', 'b', {'c':'b'}, 'e', 'f']) > {a:,b:,c:,e:,f:}
function mapper (obj, fields) {
    var newObj = {};
    for(var i = 0, cnt = fields.length; i<cnt; i++) {
        var f = fields[i];
        if(typeof f == 'string') {
            newObj[f] = obj[f]
        } else {
            for(var k in f) {
                newObj[k] = obj[ f[k] ];
            }
        }
    }
    return newObj;
}