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Mutates the original array to filter out the values specified.

Use Array.prototype.filter() and Array.prototype.includes() to pull out the values that are not needed. Use Array.prototype.length = 0 to mutate the passed in an array by resetting it's length to zero and Array.prototype.push() to re-populate it with only the pulled values.

const pull = (arr, ...args) => {
let argState = Array.isArray(args[0]) ? args[0] : args;
let pulled = arr.filter((v) => !argState.includes(v));
arr.length = 0;
pulled.forEach((v) => arr.push(v));
let myArray = ["a", "b", "c", "a", "b", "c"];
pull(myArray, "a", "c"); // myArray = [ 'b', 'b' ]