A nice way to go through an array, step by step.

README.md

var array = [1, 2, 3, 4, 5, 6, 7, 8];
var iterator = 0;

console.log( array.slice(iterator, iterator += 1) ); // => [1]
console.log( array.slice(iterator, iterator += 2) ); // => [2, 3]
console.log( array.slice(iterator, iterator += 3) ); // => [4, 5, 6]

The usage, with the utility-function below, is quite simple:

var step = stepArray([1, 2, 3, 4, 5, 6, 7, 8]);

console.log( step(1) ); // => [1]
console.log( step(2) ); // => [2, 3]
console.log( step(3) ); // => [4, 5, 6]

index.js

var stepArray = function (array) {
  var iterator = 0;
  return function (index) {
    return array.slice(iterator, iterator += index);
  };
};