Re^2: strptime("%Y-%m") in perl6

Let's say I want to check if month is valid. In perl 5 it is so simple:


use Time::Piece; localtime()->strptime(@ARGV[0], "%Y-%m");
[download]

I don't care about date parsing, I don't look at string at all -- perl5 does that for me.


bash$    perl -e 'use Time::Piece; localtime()->strptime(@ARGV[0], "%Y
+-%m"); print "ok\n"; '  "2019-01"
ok


bash$    perl -e 'use Time::Piece; localtime()->strptime(@ARGV[0], "%Y
+-%m"); print "ok\n"; '  "2019-77"
Error parsing time at /usr/lib/x86_64-linux-gnu/perl/5.26/Time/Piece.p
+m line 481.
[download]

What is elegant way to do thatn in perl6?

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Re^3: strptime("%Y-%m") in perl6 by choroba (Cardinal) on Feb 05, 2019 at 14:55 UTC
But also `$ perl -MTime::Piece -le 'localtime()->strptime(shift, "%Y-%m-%d"); pr +int "ok"' 2019-02-30 ok` [download] `map{substr$_->[0],$_->[1]\|\|0,1}[\\|\|{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^ARGV,3]`	[reply] [d/l] [select]
Re^3: strptime("%Y-%m") in perl6 by Laurent_R (Canon) on Feb 05, 2019 at 17:04 UTC
Nor sure to really understand your requirement, but what about this: `> for <1 5 3 13> -> $month { say Date.new(2019, $month, 1 )} 2019-01-01 2019-05-01 2019-03-01 Month out of range. Is: 13, should be in 1..12 in block <unit> at <unknown file> line 1` [download]	[reply] [d/l]
Re^4: strptime("%Y-%m") in perl6 by leszekdubiel (Scribe) on Feb 05, 2019 at 17:34 UTC
I need to check command line args. I expected perl6 to be simple as: `"parse ARGS[0] as %Y-%m od die"` [download] Just one sentence without additional ARGS[0] manipulation.	[reply] [d/l]
Re^5: strptime("%Y-%m") in perl6 by Laurent_R (Canon) on Feb 05, 2019 at 20:17 UTC
In Perl6, the special MAIN subroutine, if any, receives the arguments passed to the program and can be used to check their type and validity: `~ perl6 -e 'sub MAIN (Int $month where 1 <= $month <= 12) {say "Succes +s";}' 4 Success ~ perl6 -e 'sub MAIN (Int $month where 1 <= $month <= 12) {say "Succes +s";}' 14 Usage: -e '...' <month> ~ perl6 -e 'sub MAIN (Int $month where 1 <= $month <= 12) {say "Succes +s";}' 8.5 Usage: -e '...' <month>` [download] Is this the type of thing you're after?	[reply] [d/l]