javascript how to split array into subarrays javascript

1function splitArrayIntoChunksOfLen(arr, len) {
2  var chunks = [], i = 0, n = arr.length;
3  while (i < n) {
4    chunks.push(arr.slice(i, i += len));
5  }
6  return chunks;
7}
8var alphabet=['a','b','c','d','e','f'];
9var alphabetPairs=splitArrayIntoChunksOfLen(alphabet,2); //split into chunks of two

1// Example array.
2let randomArray = [3, 5, 1, 5, 7,];
3// Create an empty array.
4let arrayOfArrays = [];
5
6function splitArray( array ) {
7    while (array.length > 0) {
8        let arrayElement = array.splice(0,1);
9        arrayOfArrays.push(arrayElement);
10    }
11    return arrayOfArrays;
12}
13
14// Call the function while passing in an array of your choice.
15splitArray(randomArray)
16// => [ [ 3 ], [ 5 ], [ 1 ], [ 5 ], [ 7 ] ]