Gist 215171539b05b8928b7a
This example demonstrates a JavaScript function that checks whether all characters from one string appear in another, returning a boolean based on the comparison. The code defines `mutation(arr)`, which takes an array of two strings, converts both to lowercase, and iterates through the second string’s characters using a `for` loop with `indexOf` to test for presence. However, the logic incorrectly returns `true` or `false` immediately after checking the first character, rather than evaluating the entire string. The example calls the function with `["hello", "oen"]` and relies on native JavaScript string methods rather than any visualization library or rendering API.