jquery - best way to get the key of a key/value javascript object -


if have js object like:

var foo = { 'bar' : 'baz' }

if know foo has basic key/value structure, don't know name of key, what's easiest way it? for ... in? $.each()? hope there's better....

if want keys, ecmascript 5 introduced object.keys. supported newer browsers mdc documentation provides alternative implementation (which uses for...in btw):

if(!object.keys) object.keys = function(o){      if (o !== object(o))           throw new typeerror('object.keys called on non-object');      var ret=[],p;      for(p in o) if(object.prototype.hasownproperty.call(o,p)) ret.push(p);      return ret; }

of course if want both, key , value, for...in reasonable solution.


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