"use strict";

module.exports = function map(iterable, mapper) {
	if (Array.isArray(iterable)) {
		// This may have an optimized implementation
		return iterable.map(mapper);
	} else {
		let result = [];
		let i = 0;

		for (let item of iterable) {
			result.push(mapper(item, i, iterable));
			i++;
		}

		return result;
	}
};