On 2020-05-31 12:48, Veesh Goldman wrote:
well, literally it would mean something like "a direct result of
inability to read is to not understand", which in context should mean if
you can't read you won't understand. But I think the point was made.
Hi Veesh,
Please help me with my reading skills here.
https://docs.raku.org/routine/starts-with
multi method starts-with(Str:D: Str(Cool) $needle, :i(:$ignorecase),
:m(:$ignoremark) --> Bool:D)
Does this or does this not state that the "Haystack"
(invocant) is required to be defined ("Str:D:")?
If I am reading it correctly, is requires a "defined"
("D") Haystack (invocant). Am I misreading something?
Running a test, the method DO NOT check for defined:
p6 'my $x; say $x.starts-with( "1" );'
No such method 'starts-with' for invocant of type
'Any' in block <unit> at -e line 1
What am I misreading? Does it say anywhere that the
Haystack in not defined? Does it way anywhere that I
violated the requirement that the Haystack be defined?
And what is "No such method 'starts-with'" suppose to
mean? I am staring at the method on right on the manual
page. Did the developers forget to include "opens-with"
on my version of Raku? Obvious it does not mean what
it says. Unless my reading skill really suck.
Also, lets add to my reading comprehension, the Needle:
`Str(Cool) $needle`
I do not see "D" or "U" anywhere. Am I missing something?
A test:
$ p6 'my $x; say "abc".starts-with( $x );'
Cannot resolve caller starts-with(Str:D: Any:U);
none of these signatures match: ...
Okay, now it tells me "Any:U" for the needle. It
is telling me that I sent it a undefined value. To
me, that is a good troubleshooting hint. Am I
misreading it?
Now what I would "like to see" (suggestion, not a demand),
is the Haystack complain in a similar fashion. For instance:
starts-with's invocant requires a defined value (Str:D)
Have I misread anything?
-T
不十分に書かれている場合、指示は理解するのが困難です
