adding to json property that may or may not exist yet

Question

let say I want to do this:

  var dashboard = {};
  var page = \"index\";

  $(\'.check\').click(function(){ 
    $(thi         


        

Answer 1

If you use underscore >= 1.9.0, you can use property and propertyOf:

d={a: {b: "c"}}
_.property(["a", "b", "c", "e"])(d)   // undefined
_.property(["a", "b"])(d)             // "c"
_.propertyOf(d)(["a", "b", "c", "e"]) // undefined
_.propertyOf(d)(["a", "b"])           // "c"