arrow function examples

0.md

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions#No_binding_of_arguments

1_before.js

var arguments = 42;
var arr = () => arguments;

arr(); // 42

function foo() {
  var f = (i) => arguments[0] + i; // foo's implicit arguments binding
  return f(2);
}

foo(1); // 3

function foo() { 
  var f = (...args) => args[0]; 
  return f(2); 
}

foo(); // 2

2_after.js

var arguments = [1, 2, 3];

var arr = () => arguments[0];

arr(0); // 1

function foo(n) {
  var f = () => arguments[0] + n;
  return f(10);
}

foo(1); // 2

function foo(n) {
  var f = (...args) => args[0] + n;
  return f(10);
}
foo(1); // 11