15-mutations.js

/*
Mutations:
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.
For example, ["hello", "Hello"], should return true because all of the letters in the second string are present in the first, ignoring case.
The arguments ["hello", "hey"] should return false because the string hello does not contain a y.
Lastly, ["Alien", "line"], should return true because all of the letters in line are present in Alien.

- mutation(["hello", "hey"]) should return false.
- mutation(["hello", "Hello"]) should return true.
- mutation(["zyxwvutsrqponmlkjihgfedcba", "qrstu"]) should return true.
- mutation(["Mary", "Army"]) should return true.
- mutation(["Mary", "Aarmy"]) should return true.
- mutation(["Alien", "line"]) should return true.
- mutation(["floor", "for"]) should return true.
- mutation(["hello", "neo"]) should return false.
- mutation(["voodoo", "no"]) should return false.
- mutation(["ate", "date"]) should return false.
- mutation(["Tiger", "Zebra"]) should return false.
- mutation(["Noel", "Ole"]) should return true.
 */
function mutation(arr) {
    const firstString = arr[0].toLowerCase();
    const secondString = arr[1].toLowerCase();
    for (let char of secondString) {
        if (!firstString.includes(char)) {
            return false;
        }
    }
    return true;
}

console.log(mutation(["hello", "hey"]));
console.log(mutation(["hello", "Hello"]));
console.log(mutation(["zyxwvutsrqponmlkjihgfedcba", "qrstu"]));
console.log(mutation(["Mary", "Army"]));
console.log(mutation(["Mary", "Aarmy"]));
console.log(mutation(["Alien", "line"]));
console.log(mutation(["Alien", "line"]));
console.log(mutation(["hello", "neo"]));
console.log(mutation(["voodoo", "no"]));
console.log(mutation(["ate", "date"]));
console.log(mutation(["Tiger", "Zebra"]));
console.log(mutation(["Noel", "Ole"]));