Sprints: Incorrect string.indexOf description

[Joaos98]

Request type

• [ ] Correction or update

Details

The description of the fromIndex parameter says that if the parameter is >= than str.length the method returns -1, but that is false.

[Leokuma]

That is actually correct.

Having a fromIndex equal or greater than length means that the search will start after the last character of the string, which doesn't make sense. Remember that fromIndex starts at 0.

[Joaos98]

Oh, sorry, i initially thought it worked like that, but then i got confused because of this one example where it returned 10 even though fromIndexwas > than length, and after some testing i now understand that it didn't return -1 because the string it was looking for is an empty string, and in that case apparently it just returns the length of the string. Thanks for the answer!

[Leokuma]

Hum, you do have a point, though:

So, when searching for an empty string, it behaves somewhat unpredictably.

[Joaos98]

Yeah, i guess there is some sort of an error after all! Well, thanks again for the answers!

[chrisdavidmills]

This is an interesting case — I do agree that the behavior and wording here is a little confusing.

I've done some testing and added some wording to

https://wiki.developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/indexOf#Syntax

Does this help?

[Leokuma]

For me it's perfect.

I can try to update the Portuguese version myself, or I can leave that with you specialists :+1:.

[chrisdavidmills]

@Leokuma cool, I'm glad it is helpful!

For the pt-BR, I'm sure you write much better Portuguese than any of us ;-) We have no Portuguese speakers on the team.

[Leokuma]

I updated the pt-BR page.