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<title>JavaScript object key length</title>
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<pre>
<script type="text/javascript">
var myObj = {}; // indicates an Object is created
myObj.commercial = ".com";
myObj.network= ".net";
myObj.organization= ".org";
myObj.government= ".gov";
document.writeln( Object.keys(myObj) );
// return ["commercial", "network", "organization", "government"]
document.writeln( Object.keys(myObj).length );
// return 4
</script>
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