How-to articles, tricks, and solutions about KEY
How to find array / dictionary value using key?
In PHP, you can use the $array[$key] syntax to get the value stored at a particular key in an array.
How to print a dictionary's key?
To print the keys of a dictionary in Python, you can use the built-in keys() method.
How to update a value, given a key in a hashmap?
To update the value associated with a key in a HashMap in Java, you can use the put() method.