another way to replace for(var key in o) ?

[html20009876]

Is code of for(var key in o) only way to enumerate properties of object o?

Is there second way for enumerating properties of object o?

Thanks.

.

[MarPlo]

Hi,
There is also for each (variable in object).
It works the same way as "for .. in" , but instead of iterating over an objects property names, it iterates over the property values.
Example:

<script type="text/javascript"><!--
var obj = {apple:100, bool:false, astring:"www.coursesweb.net"};
for each (item in obj) {
  document.write(item + '<br />');
}
--></script>

Result:

78
false
www.coursesweb.net

[rnd me]

var o={a:1,b:2,c:3};

function dump(key, index){
  return key + "= " +o[key];
}

alert(
 Object.keys(o).map(dump).join("\n")
);

[rnd me]

There is also for each (variable in object)

according to who?