Re^6: Using lazy list with a for loop

That has all the problems of the each builtin.

Better to have a generator creator and user.

my $iter = $api->get_widgets_iter();

while ( my ( $widget ) = $iter->() ) {
   ...
}
[download]

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Re^7: Using lazy list with a for loop by LanX (Saint) on Jan 03, 2023 at 15:24 UTC
I agree there are some edge cases to consider depending on the use-case... and I don't know the OPs use cases good enough. But because of cleaner scope and loop-control statements I'd rather prefer `for (my $iter = get_iter(); my ( $widget ) = $iter->(); ) { ... }` [download] over `my $iter = get_iter(); while ( my ( $widget ) = $iter->() ) { ... }` [download] This approach will put $iter in a tight scope and properly destroy. Needless to say, if Perl had macros like Lisp, we wouldn't need to repeat that discussion again and again... Keyword-simple could solve this, but is restricted to statements only. see also Can I check if a loop's scope is entered for the first time? Cheers Rolf _{(addicted to the 𐍀𐌴𐍂𐌻 Programming Language :) Wikisyntax for the Monastery}	[reply] [d/l] [select]
Re^8: Using lazy list with a for loop by ikegami (Patriarch) on Jan 03, 2023 at 16:26 UTC
I agree there are some edge cases to consider depending on the use-case... Code that fails subtly when an exceptions or next/last is occurs? It's not a question of if it's going to bite you, but when.	[reply]