[senkora]

The part that confuses me is that they use “it” to name a variable that is not actually an iterator. That’s very bad style. I would name it “s”.

[pizza234]

No argument that it's inappopriate, but I wonder if the author works with other programming languages - in some (Groovy, Kotlin, Ruby), "it" is the implicit block parameter.

[Maxatar]

Haha I always interpreted "it" to mean literally the word "it". I didn't realize it's a short-hand form for iterator, but now I'm not so sure if that's universal or if there's a genuine split.

[pwdisswordfishq]

It's "it" as in the pronoun, not as in "iterator".

[zbentley]

We call that “Larry Wall nomenclature”.