Basic Algorithm Scripting: Mutations - where to start

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The challenge guide

freeCodeCamp Challenge Guide: Mutations

Mutations Problem Explanation Return true if the string in the first element of the array contains all of the letters of the string in the second element of the array… Relevant Links String.indexOf() Hints Hint 1 If everything is lowercase it will be easier to compare. Hint 2 Our strings might be easier to work with if they were arrays of characters. Hint 3 A loop might help. Use indexOf() to check if the letter of the second word is on the first. Solutions

Solution 1 (Clic…

Suggests using

String.indexOf()

But I don’t understand how this applies either.