{} makes any difference?

Asked Mar 21 '19 at 10:29

Active Mar 21 '19 at 10:29

Viewed 26 times

const fruits = ["Apples", "Oranges", "Grapes"];

const singleFruit = fruits.map(fruit => {
  fruit.slice(0, -1);
});

console.log(singleFruit);

output: (3) [undefined, undefined, undefined]

but without {} inside map(),

const fruits = ["Apples", "Oranges", "Grapes"];

const singleFruit = fruits.map(fruit => fruit.slice(0, -1));

console.log(singleFruit);

output: (3) ["Apple", "Orange", "Grape"]

only difference is { }. as far as I know, {} does not matter if there is only one sentence inside {}. Could you guys explain it?

asked Mar 21 '19 at 10:29

Gyeongju_Andy

1

when u use { }, u must return value for it – Ryan Nghiem Mar 21 '19 at 10:32
I don't get it. could you give me the example? you could omit {} if there is one sentence inside function. Am I right? – Gyeongju_Andy Mar 21 '19 at 10:38
`const singleFruit = fruits.map(fruit => { return fruit.slice(0, -1); });` . that's same `const singleFruit = fruits.map(fruit => fruit.slice(0, -1));` – Ryan Nghiem Mar 21 '19 at 10:40
oh now I get it! I forgot 'return' Thanks Ryan!! :) – Gyeongju_Andy Mar 21 '19 at 10:42

0 Answers0