A Pen by Sebastian.

index.html

<h1>Look in the console!</h1>

Robust-getter-Fn.markdown

Robust getter Fn

Get property of an object no matther if it is deeply nested or doesn't even exist.

A Pen by Sebastian on CodePen.

License.

script.js

(function ( undefined ) {
  
  // Fixture
  var data = {
    "created": "2013-09-25T13:28:36.562Z",
    "persons" : [
      {
        "id": 0,
        "isActive": true,
        "age": 20,
        "name": "Rodgers Steele",
        "gender": "male",
        "email": "[email protected]",
        "phone": "+1 (990) 474-2484",
        "address": "821 Freeman Street, Cornfields, Connecticut, 567"
      },
      {
        "id": 1,
        "isActive": true,
        "age": 35,
        "name": "Haney Mcintosh",
        "gender": "male",
        "email": "[email protected]",
        "phone": "+1 (818) 454-2993",
        "address": "761 Beach Place, Shrewsbury, Missouri, 2955"
      },
      {
        "id": 2,
        "isActive": false,
        "age": 38,
        "name": "Alisha Patterson",
        "gender": "female",
        "email": "[email protected]",
        "phone": "+1 (825) 548-2662",
        "address": "847 Sandford Street, Blanco, Tennessee, 1727"
      },
      {
        "id": 3,
        "isActive": false,
        "age": 38,
        "name": "Autumn Avery",
        "gender": "female",
        "email": "[email protected]",
        "phone": "+1 (875) 537-3726",
        "address": "729 Seton Place, Vicksburg, Alaska, 4125"
      },
      {
        "id": 4,
        "isActive": false,
        "age": 37,
        "name": "Skinner Baxter",
        "gender": "male",
        "email": "[email protected]",
        "phone": "+1 (845) 582-2520",
        "address": "665 Chestnut Street, Berlin, West Virginia, 8698"
      },
      {
        "id": 5,
        "isActive": true,
        "age": 27,
        "name": "Underwood Johnston",
        "gender": "male",
        "email": "[email protected]",
        "phone": "+1 (886) 553-3241",
        "address": "951 Crooke Avenue, Taycheedah, New Mexico, 7855"
      }
    ]         
  };
  
  // Robut getter
  // @param {Object} o the object
  // @oaram {String} p the property to get
  //
  // @return {Any} Returns the property if found, "undefined" otherwhise
  function getProperty ( o , p ) {
    var n = p.replace(/\[(\w+)\]/g, '.$1').match(/^(\w+)\.?(.*)/);
    return !n[2] ? o[n[1]] : getProperty(o[n[1]], n[2]);
  };
  
  // Use cases
  console.log(getProperty( data, 'created' ));
  console.log(getProperty( data, 'persons' ));
  console.log(getProperty( data, 'persons[1].phone' ));
  console.log(getProperty( data, 'persons[2].age' ));
  
  console.log(getProperty( data, 'foo' ));
  console.log(getProperty( data, 'persons[1].phone.foo' )); 
  
})( );