Using arrow functions to generate arrays out of original array.

arrow_functions_usage_on_arrays.js

const arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
console.log("arr: ", arr);

let even = arr.filter(x => x%2 === 0);
console.log("evens: ", even);

let odd = arr.filter(x => x%2 === 1);
console.log("odds: ", odd);

let gt5 = arr.filter(x => x > 5);
console.log("greater than 5: ", gt5);

let lt5 = arr.filter(x => x  < 5);
console.log("less than 5: ", lt5);

let div5 = arr.filter(x => x%5 === 0);
console.log("divisible by 5: ", div5);

output.txt

arr: [1,2,3,4,5,6,7,8,9,10] 
evens: [2,4,6,8,10] 
odds: [1,3,5,7,9] 
greater than 5: [6,7,8,9,10] l
ess than 5: [1,2,3,4] 
divisible by 5: [5,10]

output_of_es_2015.js

"use strict";

var arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
console.log("arr: ", arr);

var even = arr.filter(function (x) {
  return x % 2 === 0;
});
console.log("evens: ", even);

var odd = arr.filter(function (x) {
  return x % 2 === 1;
});
console.log("odds: ", odd);

var gt5 = arr.filter(function (x) {
  return x > 5;
});
console.log("greater than 5: ", gt5);

var lt5 = arr.filter(function (x) {
  return x < 5;
});
console.log("less than 5: ", lt5);

var div5 = arr.filter(function (x) {
  return x % 5 === 0;
});
console.log("divisible by 5: ", div5);