Re^5: [Raku] Ranges in array slices

in reply to Re^4: [Raku] Ranges in array slices
in thread [Raku] Ranges in array slices

To make sure, we're on the same page, the sequence of even numbers can end:

> say 0,  * + 2  ... $_ for 2, 10
(0 2)
(0 2 4 6 8 10)
[download]

And if this was obvious, then - yes, that's the point. Sequences allow this kind of dissonances. No error is reported by the language. There's space for absurd. Or what should this be better called?

Comment on Re^5: [Raku] Ranges in array slices Download Code

Replies are listed 'Best First'.
Re^6: [Raku] Ranges in array slices by holli (Abbot) on Jun 05, 2021 at 21:08 UTC
I see no dissonance or absurdity here. The code creates two Sequences in a loop and they end because the end conditions (2 and 10) (the thing to the right of ....) get reached. If you create a sequence like `0, * + 2 ... 1` where the values go up and the end value is smaller than even the first calculated value, then that Seq. ~~will~~ can never end. holli You can lead your users to water, but alas, you cannot drown them.	[reply] [d/l] [select]
Re^6: [Raku] Ranges in array slices by LanX (Saint) on Jun 05, 2021 at 21:00 UTC
> Or what should this be better called? "lazy list" is the term > No error is reported by the language. because it's a feature. :) update see https://docs.raku.org/language/list#Sequences Lazy evaluation Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery}	[reply]

In Section Seekers of Perl Wisdom

update