On 9/26/18 10:47 AM, The Sidhekin wrote:
On Wed, Sep 26, 2018 at 8:58 AM Todd Chester <toddandma...@zoho.com
<mailto:toddandma...@zoho.com>> wrote:
Hi All,
Over on
https://docs.perl6.org/routine/words
I see
multi method words(Str:D $input: $limit = Inf --> Positional)
HOW IN THE WORLD did they convert `$limit = Inf` into an
array index!?!?!
It's not. It's a limit:
eirik@greencat[19:41:18]~$ perl6 -e '.say for "foo bar baz qux".words(2)'
foo
bar
eirik@greencat[19:41:29]~$
I see from your other email that you're using square brackets.
That's what makes a zero-based index:
eirik@greencat[19:41:29]~$ perl6 -e '.say for "foo bar baz qux".words[2]'
baz
eirik@greencat[19:43:00]~$
But this index is not an argument to the words method. It is an
argument to the .[ ] postcircumfix.
That these are different things is perhaps more easily seen when
they're both present:
eirik@greencat[19:45:54]~$ perl6 -e '.say for "foo bar baz
qux".words(3)[*-1]'
baz
eirik@greencat[19:45:59]~$
Here, it may be clearer that the $limit is 3, and the index is *-1.
Eirik
Hi Eirik,
Thank you for the explanation.
I think I did not make myself clear. I do know how to
use the function and I use it all the time.
What I don't understand is:
multi method words(Str:D $input: $limit = Inf --> Positional)
Specifically "$limit = Inf". Why are we using "$limit" instead
of "$selection" and why are we throwing "Inf" into the mix
as it is a "type". "Types" are written like "Str:D" and come
before the variable, not after. (I know the ":D" means "defined".)
And where is it stated what goes in the () and what goes
in the []?
Yours in frustration,
-T
