On 9/26/18 4:33 PM, The Sidhekin wrote:
On Wed, Sep 26, 2018 at 11:40 PM ToddAndMargo <toddandma...@zoho.com
<mailto:toddandma...@zoho.com>> wrote:
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"
Perhaps this would be easier if you explain where you're getting
"$selection", and what you think it is.
$ p6 '"a b c d e".words[ 2, 4 ].say;'
(c e)
or
$ p6 '"a b c d e".words()[ 2, 4 ].say;'
(c e)
I am selecting the 2nd and 4th word starting from zero. Inside
the brackets I am asking it to select th e 2nd and 4th words for me.
I am NOT asking it to limit my request to Infinity.
And where is it stated what goes in the () and what goes
in the []?
The () is part of a method call syntax; method arguments go there:
https://docs.perl6.org/language/syntax#Subroutine_calls
Where does it state that
$ p6 '"a b c d e".words(3).say;'
(a b c)
means the first three words, starting at zero?
The [] is a postcircumfix operator; index arguments go there:
https://docs.perl6.org/language/operators#postcircumfix_[_]
Where does
multi method words(Str:D $input: $limit = Inf --> Positional)
state that I can do such?
I ask this because not all methods will take []
$ p6 '"a b c d e".contains( "a","b" ).say;'
Cannot convert string to number: base-10 number must begin with valid
digits or '.' in '⏏b' (indicated by ⏏)
in block <unit> at -e line 1
$ p6 '"a b c d e".contains( 1, 3 ).say;'
Ambiguous call to 'contains(Str: Int, Int)'; these signatures all match:
:(Str:D: Cool:D $needle, Cool:D $pos, *%_)
:(Str:D: Cool:D $needle, Cool:D $pos, *%_)
in block <unit> at -e line 1
Also, where is it stated that
$ p6 '"a b c d e".words(3)[ 2, 4 ].say;'
(c Nil)
will send the first three words to [2,4] ?
Thank you for helping me with this!
-T
