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iterate through array elements or object properties


commentsJavascript sourceExecution result in your current browser
for/in for array
   var array3=[10,20,30];
   for (var i in array3) {
     var element=array3[i];
     document.write("array3("+i+")="+element+"<br/>");
   }

each or forEach in underscore
  _.forEach(array3, function(elem) {
     document.write(elem+"<br/>");
   });

for/in for object
  var obj={"a":"One", "2b":"Two", "c":"Three"};
  for(var key in obj) {
    var val=obj[key];
    document.write(key+"=>"+val+"<br/>");
  }

forEach for object
  _.forEach(obj, function(val) {
     document.write(val+"<br/>");
   });