>1) why is it "$needle" and not "$!needle" on line 338? > Is this because it is an internal variable and not > a variable from the class declaration?
It's a parameter from line 337. If that's what you mean by "an internal variable", then yes. :) >2) where is variable ".value" defined on line 338? > What kind of variable is .value? I don't see a `.value`, only a `$!value`. But if I did, and had that sort of name, it would typically be a method call that returns an attribute of the same name -- like `$!value`. >3) the first "Str:D" goes to what on line 337? To .value? No, to the invocant. >4) Is .value the default, if there is no name given? I don't see a `.value`, nor what you mean by "name". On Sun, Dec 20, 2020 at 7:05 AM ToddAndMargo via perl6-users <perl6-users@perl.org> wrote: > > Hi All, > > https://github.com/rakudo/rakudo/blob/master/src/core.c/Str.pm6 > > 337:multi method contains(Str:D: Str:D $needle --> Bool:D) { > > 338:nqp::hllbool(nqp::isne_i(nqp::index($!value,$needle,0),-1)) > 339:} > > I "presume" in > > "abcd".contains("bc") > > "abcd" is `$!value`, and > > "bc" is $needle. Do I presume correctly? > > > Questions: > > 1) why is it "$needle" and not "$!needle" on line 338? > Is this because it is an internal variable and not > a variable from the class declaration? > > 2) where is variable ".value" defined on line 338? > What kind of variable is .value? > > 3) the first "Str:D" goes to what on line 337? To .value? > > 4) Is .value the default, if there is no name given? > > Many thanks, > -T
