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// Arrow functions are anonymous
// ES6
([param] [, param]) => {
  statements
}
// ES5
function ([param] [, param]) {
  statements
}

// ES6
param => expression
// ES5
function (param) {
  return expression
}


// To name an arrow function anyway
// ES6:
var doSomething = () => {
  //...
}


// example 1:
// ES5
var numbers = [1,2,3,4,5];
var timesTwo = numbers.map(function (number) {
  return number * 2;
});
// ES6
var numbers = [1,2,3,4,5];
var timesTwo = numbers.map((number) => number * 2);
console.log(timesTwo); // [2, 4, 6, 8, 10]
console.log(timesTwo); // [2, 4, 6, 8, 10]


// example 2:
// ES5
function FooCtrl (FooService) {
  var that = this;
  that.foo = 'Hello';
  FooService
  .doSomething(function (response) {
    that.foo = response;
  });
}
// ES6
function FooCtrl (FooService) {
  this.foo = 'Hello';
  FooService
  .doSomething((response) => { // woo, pretty
    this.foo = response;
  });
}
// ES6: even better
function FooCtrl (FooService) {
  this.foo = 'Hello';
  FooService
  .doSomething((response) => this.foo = response);
}