How do I multiply an array of numbers with another array of numbers in javascript-CodePudding

I've been trying to make an array of numbers be able to times another array of numbers without doing array.join("") * array2.join("").

I've tried a lot of methods such as:

var input = [3, 6, 4];
var scalar = 5;
var output = input.map(x => x * scalar); // [15, 30, 20]

Although that's only one number the array can multiply to.

I'd like a function that can do:

var array = [ 1, 3, 2 ];
var array2 = [ 5, 3, 8, 2, 3, 5, 2 ];
someFunction(array, array2);
// [ 7, 1, 0, 4, 7, 0, 4, 6, 4 ]

Please note I don't want it to be something like

array.join("") * array2.join("")

I'm willing to give all my reputation as a bounty if someone is able to answer my question.

CodePudding user response：

If scientific notation is the problem, turn the arrays into BigInts instead.

var array = [ 1, 3, 2, 4, 5, 6, 7, 8, 9, 1, 2, 3, 4, 5 ];
var array2 = [ 5, 3, 8, 2, 3, 5, 2, 4, 5, 6, 7, 8, 9, 1, 2, 3, 4, 5 ];
const someFunction = (arr1, arr2) => [...String(
  BigInt(arr1.join('')) * BigInt(arr2.join(''))
)].map(Number);
console.log(someFunction(array, array2));