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67 lines (52 loc) · 1.61 KB
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/* eslint-disable */
// Refactor the following code to use the specified ES6 features.
// There are no automated tests.
// To make sure the code still works you can run this file using `node es6.js` from inside `/src`.
//----------------
// const, =>, default parameters, arrow functions default return statements using ()
let food = 'pineapple';
const isMyFavoriteFood = (food = 'thousand-year-old egg') => food;
const isThisMyFavorite = isMyFavoriteFood(food);
//----------------
//const, class, template literals, enhanced object literals (foo: foo, -> foo,)
function User({username, password}) {
return {
username,
password,
sayHi() {
`${username} says hello!`;
}
}
}
// const options = [
// {
// username: 'JavaScriptForever',
// password: 'password'
// }
// ];
const me = User({username: 'JavaScriptForever', password: 'password'});
console.log(me.username); // 'JavaScriptForever'
console.log(me.password); // 'password'
console.log(me.sayHi()); // undefined :(
// ----------------
// let, const, =>, ... (spread operator)
const addArgs = (array) => {
const args = Array.from(array);
console.log(args);
return args.reduce((sum, arg) => {
return sum + arg;
}, 0)
// var sum = 0;
// for (var i = 0; i < arguments.length; i++) {
// sum += arguments[i];
// }
// return sum;
};
// var argsToCb = function (cb) {
// var args = Array.prototype.slice.call(arguments);
// return cb.apply(null, args.splice(1));
// };
var result = addArgs([1,2,3,4]); // => 10
// var result = argsToCb(addArgs, 1, 2, 3, 4, 5); //result should be 15
console.log(result);
/* eslint-enable */