The Array Object in JavaScript has a built-in reduce method that iterates ... where you can pass in the value and index of the current array position numbers.forEach((number, index) => {...}); Inside ...

JavaScript’s arrays can hold heterogeneous types, change size on the fly, and readily insert or remove elements. Traditional methods like slice, splice, and push/pop do this by operating on the ...

{{jsxref("Array/flatMap", "flatMap()")}}, {{jsxref("Array/forEach ... at the given index replaced with the given value, without modifying the original array. If you're not yet familiar with array ...