Thoom Technologies

» I was looking for the proper way to delete an object property in Javascript and came upon this nice example. I figured it was worth sharing. I’ve also included a similar way of handling it in PHP.

var obj = {asdf:'foo',bar:'baz'};
obj.asdf = undefined;
for ( var i in obj ) {
 console.log(i,obj[i]);
}
// outputs:
// asdf undefined
// bar baz

var obj = {asdf:'foo',bar:'baz'};
delete obj.asdf;
for ( var i in obj ) {
 console.log(i,obj[i]);
}
// outputs:
// bar baz

Using an array in PHP (just for reference) the code would look like:

$obj = array('asdf' => 'foo', 'bar' => 'baz');
$obj['asdf'] = null;
foreach ( $obj as $key => $val ) {
 echo "$key $val"; 
}
// outputs:
// asdf 
// bar baz

$obj = array('asdf' => 'foo', 'bar' => 'baz');
unset($obj['asdf']);
foreach ( $obj as $key => $val ) {
 echo "$key $val"; 
}
// outputs:
// bar baz