Challenge: Swap Keys with Values of an Associative Array

We know that associative arrays provide a map from keys to values. This mapping is unidirectional: values are accessed by keys but not the other way around.

Problem statement #

Assume that you are given an associative array names as having strings names as element values. Use this associative array and a foreach loop to initialize another associative array called values. The new associative array should contain element values that correspond to the keys of the array names.

Input #

string[int] names = [ 1:"one", 7:"seven", 20:"twenty" ];

Output #

writeln(values["twenty"]); //prints 20

Challenge #