This is the main discussion thread generated for A Birds Eye View Into Sliding Windows.

Yes! Great call-- updating and improving the lesson.

I need some clarification with the first while loop:

`while end

Hi!
I'm confused a bit :) Please, help

First print(min_window("abcalgosomedailyr", "ad")) prints "algosom". It doesn't look right :)
And, second, what correct answer to this problem should be in this case: "algosomed" or "da"? I don't get from text. Does order of characters in found substring matter and should it match with order of characters in pattern (req_chars) or not?

Hi Dmitry Pavlov,

Thanks for much catching that-- there was a bug on the last line. Instead of slicing the input string from begin to substr_size, it should've been from begin to begin + substr_size, exclusive of the last character.

The correct answer should be algosomed since we need to retain the order of the input string characters in the found substring. I'll also add a note about order in the updated tutorial!

It seems this is a confusing topic for many, so I'll be producing a video for this. Stay tuned :-)

Hi Dmitry Pavlov,

I made a follow up video explaining how the sliding window method works in detail, by stepping through execution. I also brushed up the written tutorial a bit, hope it's clearer now!

Thank you, Jake!