[JS] fCC's exercise Chunky monkey: https://codepen.io/adrianskar/pen/zjjpdG

chunky_monkey.js

function chunkArrayInGroups(arr, size) {
 var newarr=[];

for (i=arr.length, y=0; i>0; i-=size, y+=size){ 
  newarr.push(arr.slice(y, size+y));
}
/* Simpler using just one var but calculates arr.length on each iteration
for (i=0; i<arr.length; i+=size){
  newarr.push(arr.slice(i, i+size));
}*/
return newarr;
  
}

chunkArrayInGroups(["a", "b", "c", "d"], 2);