Code examples for mrbalihai.github.io/2016/01/24/making-the-most-of-es6.html

arrow-function-es5.js

var myArray  = [1, 2, 3, 4, 5, 6],
    add      = function (a, b) {
      return a + b;
    },
    getTotal = function (arr) {
      return arr.reduce(add, 0);
    };

getTotal(myArray); // => 21

arrow-function.js

const myArray  = [1, 2, 3, 4, 5, 6],
      add      = (a, b) => a + b,
      getTotal = (arr) => arr.reduce(add, 0);

getTotal(myArray); // => 21

let-and-var.js

function varTest() {
  var x = 31;
  if (true) {
    var x = 71;  // same variable!
    console.log(x);  // 71
  }
  console.log(x);  // 71
}

function letTest() {
  let x = 31;
  if (true) {
    let x = 71;  // different variable
    console.log(x);  // 71
  }
  console.log(x);  // 31
}

template-strings.js

  var sausage = 'cumberland';
  console.log(`my favourite sausage is ${sausage}`);
    // => 'my favourite sausage is cumberland'

  var a = 1, b = 2;
  console.log(`a + b = ${a + b}`);
    // => 'a + b = 3'