It is a tuple. We have used Tuple Indexing here, We know that True value refers to 1 and False refers to 0. So the first element in the tuple is False corresponding to Tuple index zero(false) and the second value is True corresponding to Tuple index one(True)

Still a bit confused. Description says integer arrays so wouldn't this solution fail if the missing element was a 0 or potentially a negative number?

noice

The i here is just a number, so i+1 is fine. If you had tried to do lines[i+1] then you might run into an issue.

But also range(0) is empty, so no values are computed for empty lists anyway.

Hi,
I wrote this code as a starting point but did not expect it to pass all tests.
I do not understand why it works with empty lists.

If lines is an empty list, then len(lines)=0.
So {i+1} should generate an error, shouldn't it ?

thanks :)

technically you are right, please don't write it in real project because use True False over 0 1 is really counterintuitive. But programming in codewars is only for educational purpose so this one-linear solution is "the best".
Again, don't try it in real project. Readability matters the most in real project.

Hello Garl and all
I'm new to programming, and I'm curious why this would be considered "best practices" as it seems to go agains seveal things I've been told are best practices

1. name variables in ways that convey meaning ('left', 'right', 'call' mett that, x,y z do not)
2. readability over brevity (it takes time for a reader to remember that True and False are interpreted as 0 and 1, and thus readability is reduced)

Humbly looking to learn,
-DMC

if you use more built-in functions then the answer is yes.

what a math genius!