src code

instance method Enumerable#inGroupsOf

Enumerable#inGroupsOf(number[, fillWith = null]) → [group…]
  • number (Number) – The number of items to include in each group.
  • fillWith (Object) – An optional filler to use if the last group needs any; defaults to null.

Like Enumerable#eachSlice, but pads out the last chunk with the specified value if necessary and doesn't support the iterator function.

Examples
var students = [
  { name: 'Sunny',  age: 20 },
  { name: 'Audrey', age: 21 },
  { name: 'Matt',   age: 20 },
  { name: 'Amelie', age: 26 },
  { name: 'Will',   age: 21 }
];
 students.inGroupsOf(2, { name: '', age: 0 });
// -> [
//      [{ name: 'Sunny', age: 20 }, { name: 'Audrey', age: 21 }],
//      [{ name: 'Matt', age: 20 },  { name: 'Amelie', age: 26 }],
//      [{ name: 'Will', age: 21 },  { name: '', age: 0 }]
//    ]