Best practice looping through a JavaScript object [duplicate]

Question

I have the following JavaScript object which I need to apply parseFloat to any number value field (in order for ngTable to sort correctly).

I'm having a tough time looping through the Object to do this. I've tried a nested angular.forEach, but I have scoping issues (inner loops don't see outer variables).

What's the best manner to approach this?

The Object names (i.e: Person and PersonDetails) are dynamic. :/

My object:

{     "data": [         {             "Person": {                 "id" : "1",                 "age": "23",                 "days": "5",                 "first_name": "Joe",                 "last_name": "Smith",             },             "PersonDetails": {                 "id": "4",                 "name": "Cousin",                 "oldest: "2",             }         },         {             "Person": {                 "id" : "2",                 "age": "18",                 "days": "3",                 "first_name": "John",                 "last_name": "Doe",             },             "PersonDetails": {                 "id": "4",                 "name": "Second Cousin",                 "oldest: "3",             }         }         ...         ...     ] }; 

Answer 1

You can do a test like this:

function representsNumber(str) {     return str === (+str).toString(); }  // E.g. usage representsNumber('a'); // false representsNumber([]); // false representsNumber(1); // false (it IS a number) representsNumber('1.5'); // true representsNumber('-5.1'); // true representsNumber('NaN'); // true 

And recurse over all your nodes. Overkill example:

function seeker(o, test, _true, _false) {     _true || (_true = function (e) {return e;});     _false || (_false = function (e) {return e;});     function recursor(o) {         var k;         if (o instanceof Array)             for (k = 0; k < o.length; ++k) // Iterate over an array                 if (typeof o[k] !== 'object')                     o[k] = test(o[k]) ? _true(o[k]) : _false(o[k]);                 else                     recursor(o[k]);         else             for (k in o) // Iterate over an object                 if (typeof o[k] !== 'object')                     o[k] = test(o[k]) ? _true(o[k]) : _false(o[k]);                 else                     recursor(o[k]);     }     if (typeof o === "object")          return recursor(o), o;     else          return test(o) ? _true(o) : _false(o); // Not an object, just transform }  // Sample usage seeker({foo: [{bar: "20"}]}, representsNumber, parseFloat); // {foo: [{bar: 20}]}