Splitting an array into two.

index.js

// Splitting an array into two.
// Use case: 
// Given array: [1,2,3,4,5]
// Expected result: [1, 2] and [3, 4, 5]
var arr = [1, 2, 3, 4, 5]
var arrLength = arr.length
var arrMidSection = Math.floor(arrLength/2) 
var leftPart = arr.slice(0, arrMidSection)
var rightPart = arr.slice(arrMidSection)
// leftPart
// (2)[1, 2]
// rightPart
// (3)[3, 4, 5]