How do you split an array into array pairs in JavaScript?

Question

I want to split an array into pairs of arrays.

var arr = [2, 3, 4, 5, 6, 4, 3, 5, 5]

would be

var newarr = [
    [2, 3],
    [4, 5],
    [6, 4],
    [3, 5],
    [5]
]

question from:https://stackoverflow.com/questions/31352141/how-do-you-split-an-array-into-array-pairs-in-javascript

Answer 1

You can use js reduce

initialArray.reduce(function(result, value, index, array) {
  if (index % 2 === 0)
    result.push(array.slice(index, index + 2));
  return result;
}, []);