let-closure.js

function testClosures() {
  "use strict";
  var result = [];
  for (var var_index = 0; var_index < 2; var_index++) {
    result.push(() => { return var_index; });
  }

  for (let let_index = 0; let_index < 2; let_index++) {
    result.push(() => { return let_index; });
  }
  return result;
}

var result = testClosures();
console.log(result[0]()); //2
console.log(result[1]()); //2
console.log(result[2]()); //0
console.log(result[3]()); //1