Dereference Object Property Path From String

Benchmark created by James Wilkins on October 30, 2013

Setup

function index(obj, i) {
    return obj[i]
  }
  var obj = {
    a: {
      b: {
        x: 0
      }
    }
  };
  
  function deref(obj, s) {
    var i = 0;
    s = s.split('.');
    while (obj && i < s.length)
      obj = obj[s[i++]];
  }
  
  function derefrecursive(obj, s, i) {
    if (i === undefined) i = 0;
    if (i < s.length) return derefrecursive(obj[s[i]], s, i + 1);
    return obj;
  }

Test runner

'a.b.x'.split('.').reduce(index, obj)

eval('obj.' + 'a.b.x')

derefrecursive(obj, 'a.b.x'.split("."))

deref(obj, 'a.b.x')

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

• Revision 1: published by James Wilkins on October 30, 2013
• Revision 2: published by Drew Noakes on February 27, 2014
• Revision 3: published by Stefan on February 13, 2015
• Revision 4: published on May 20, 2015