Check For An Key In Object in JS and PHP

Coming From Python this felt a little funny since Python has so many nice features for looking up keys and setting defaults etc.

Check if object has a key in JavaScript

https://stackoverflow.com/questions/455338/how-do-i-check-if-an-object-has-a-key-in-javascript

myObj.hasOwnProperty('key');

check if array has a key in PHP

array_key_exists('filename', $resourcePairedValue)