This is going to take some getting used to.
On Wed, February 17, 2016 3:33 pm, Morse, Richard E.,MGH wrote: > Hi! No, list context is more common. > > > In particular, it isnât the comma operator. Itâs (I think) the > parenthesis. > > `(123, 456)` creates a list of two elements. Lists no longer > automatically flatten (i.e., (1, (2, 3), 4) is only three elements long). > If there is a space after a function call, itâs assumed to be a list > operator, not a function, so the parameters are interpreted in list > context; this means that (123, 456) creates a single list object which > gets passed to your function. > > Ricky > > >> On Feb 17, 2016, at 4:26 PM, Greg London <[email protected]> wrote: >> >> >> >> So perl6 thinks it is an expression, >> With some kind of weird "comma" operator, >> Which returns a single thingy of some kind, >> That gets passed as a single argument to the function? >> >> >> What is the comma operator doing >> And what is the return thingy of the expression? >> >> >> In perl5, this would have been at most list context of 123 and 455, >> which would have returned multiple items in a list, and would be visible >> in A perl 5 sub as $_[0] and $_[1]. >> >> >> Is list context gone in perl 6? >> >> >> >> Greg >> >> >> >> >> On Wed, February 17, 2016 11:04 am, Bill Ricker wrote: >> >>> That's an ambiguous parse for 1 arg vs 2 arg form, are the parents a >>> function call or an expression. Space disambiguates it: f( a, a2) is >>> function, f (a, a2) is an expression whose result is passed to the >>> function. >>> >>> On Wed, Feb 17, 2016 at 11:43 AM, Greg London <[email protected]> >>> wrote: >>> >>> >>> >>>> >>>> Is perl6 whitespace sensitive? >>>> Or is this a bug? >>>> >>>> >>>> >>>> I have a multi() for 1 and 2 artuments >>>> But a 2 arg call ends up getting into the wrong sub >>>> Apparently because there is a space between the sub name and the >>>> Opening parenthesis? >>>> >>>> >>>> >>>> >>>> >>>> multi mysub($arg1) { say "mysub(one): $arg1"; } >>>> >>>> >>>> multi mysub($arg1, $arg2) { say "mysub(two): '$arg1' then '$arg2'"; >>>> } >>>> >>>> >>>> >>>> >>>> >>>> mysub(555); mysub(123, 456); mysub(999); mysub (123, 456); # a >>>> space between sub and parenthesis >>>> >>>> output: >>>> >>>> >>>> >>>> mysub(one): 555 >>>> mysub(two): '123' then '456' >>>> mysub(one): 999 >>>> mysub(one): 123 456 <== whoops! >>>> >>>> >>>> >>>> >>>> >>>> -- >>>> >>>> >>>> >>>> _______________________________________________ >>>> Boston-pm mailing list >>>> [email protected] >>>> http://mail.pm.org/mailman/listinfo/boston-pm >>>> >>>> >>>> >>> >>> >>> >>> -- >>> Bill Ricker >>> [email protected] https://www.linkedin.com/in/n1vux >>> >>> >> >> >> -- >> >> >> >> >> _______________________________________________ >> Boston-pm mailing list >> [email protected] >> http://mail.pm.org/mailman/listinfo/boston-pm >> > > > > The information in this e-mail is intended only for the person to whom it > is addressed. If you believe this e-mail was sent to you in error and the > e-mail contains patient information, please contact the Partners > Compliance HelpLine at > http://www.partners.org/complianceline . If the e-mail was sent to you in > error but does not contain patient information, please contact the sender > and properly dispose of the e-mail. > -- _______________________________________________ Boston-pm mailing list [email protected] http://mail.pm.org/mailman/listinfo/boston-pm
