El mié., 26 sept. 2018 a las 8:27, Todd Chester (<toddandma...@zoho.com
<mailto:toddandma...@zoho.com>>) escribió:
>> El mié., 26 sept. 2018 a las 6:12, Todd Chester
(<toddandma...@zoho.com <mailto:toddandma...@zoho.com>
>> <mailto:toddandma...@zoho.com <mailto:toddandma...@zoho.com>>>)
escribió:
>>
>> Hi All,
>>
>> https://docs.perl6.org/routine/words
>> is no help
>>
>> Not to ask too obvious a question, but why does words use a []
>> instead of a () ?
On 09/25/2018 10:38 PM, JJ Merelo wrote:
>
>
>
>
> Are you referring to a particular example? I can't find it.
yes the ones in the original post.
>
> At any rate, $whatever.words[4] is the same as $whatever.words()[4].
> That method needs no arguments, so it makes do without
parentheses. When
> it uses it, it's to limit the number of words returned.
>
> Cheers
>
> JJ
I am confused as to when to use [] and when to use () with a method.
The only thing can think of is that [] allows me to do thing like
[4]
[4,6]
[4..6]
Where I can't do it with ()
But why is (4) different than [4]?
And
https://docs.perl6.org/routine/words#class_Str
(Str) routine words
multi sub words(Str:D $input, $limit = Inf --> Positional)
multi method words(Str:D $input: $limit = Inf --> Positional)
Also is `Str:D $input:` written correctly? I have only seen it as
`Str:D:` before.
On 09/25/2018 11:29 PM, JJ Merelo wrote:
() is to pass arguments, [] is for array indexing. In your example,
words(4) calls words with the number 4. words[4] would do words()[4],
that is, words with no argument, that returns array, array indexed by 4
Something is wrong...
$ p6 'say "1a 2b 3c 4c 5c".words("c");'
Cannot convert string to number: base-10 number must begin with
valid digits or '.' in '⏏c' (indicated by ⏏)
in block <unit> at -e line 1
$ p6 'say "1a 2b 3c 4c 5c".words(c);'
===SORRY!=== Error while compiling -e
Undeclared routine:
c used at line 1
$ p6 'say "1a 2b 3c 4c 5c".words(3);'
(1a 2b 3c)
$ p6 'say "5a 4b 3c 2c 1c".words(4);'
(5a 4b 3c 2c)
Boy the docs really struck out on explaining this!
How about my `Str:D $input:` question?
