Discussion on: 10 JavaScript string methods you should know

[ItsASine (Kayla)]

repeat exists? :o

I've been doing new Array(52).join('a'); to make a string of 52 as, but I could have just used 'a'.repeat(52)... now I need to make a little commit to update that.

The other day I even ranted about how nice Python's 'a' * 52 would have been.

[Frugence Fidel]

They are not same

 const first = new Array(2).join('a');
 console.log(first); // 'a'

 const second = 'a'.repeat(2);
 console.log(second); // 'aa'

 // new Array(52).join('a') will not print 52 a's, print 51 a's
 const aLength = new Array(52).join('a').length;
 console.log(aLength); // 51

[ItsASine (Kayla)]

Oops, you're right! Typo on my part :) For the sake of my E2E tests, I actually think repeat would be easier to read.

it('displays an error for too many characters', function() {
    relevantPage.middleInitial.sendKeys('a'.repeat(2)); // clearly shows that 2 is considered too many

    expect(relevantPage.middleInitialTooLongMessage.getText()).toEqual('Middle initial is too long');
});

[Frugence Fidel]

Actually repeat is easy to read

If you want to make string of 52 a's with repeat is so easy

  const a = 'a'.repeat(52);
  console.log(a); // "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
  console.log(a.length); // 52

[siddharthray]

Array index starts from 0 which means it will print 52 times.

[diek]

Yass, and since join acts as 'glue', using 'a' as glue for 52 nothings will print 'a' 51 times. Give it a try ;)