Perl 6
WITCH star: Revision 1
^ Mnemonics
"splat", "dont care", "whatever"
-- used when you do not care or want a sensible "largest default"
----
^ Used alone
{{*}} can be used like you always have, for multiplication
{{*}} immediately before an identifier name denotes a "global"<http://perlcabal.org/syn/S02.html#Names_and_Variables>, including builtin special variables (which are global.)
{{*}} just about anywhere else, is means "whatever"<http://perlcabal.org/syn/S02.html#Built-In_Data_Types>
{{*}} within a version number functions as a wildcard
^ Operators containing this character
{{*=}} mutant assignment form of multiplication
{{** and **=}} can be used like you always have, for exponentiation
{{**}} just about anywhere else is a multidimensional whatever (see above)
{{.*}} "calls all methods"<http://perlcabal.org/syn/S03.html#Method_postfix_precedence> if there are duplicate method names
{{[*-1]}} as an array index not special syntax but is legal use of "whatever" to get at the last element of an array.
^ When used inside regexes
{{* and *?}} as a "0 or more" repeat count
^ Special Variables
^ As an adverb
^ Other Uses
^ Hyper operator and meta operator restrictions
^ Old, deprecated, or other language uses
"splat", "dont care", "whatever"
-- used when you do not care or want a sensible "largest default"
----
^ Used alone
{{*}} can be used like you always have, for multiplication
{{*}} immediately before an identifier name denotes a "global"<http://perlcabal.org/syn/S02.html#Names_and_Variables>, including builtin special variables (which are global.)
{{*}} just about anywhere else, is means "whatever"<http://perlcabal.org/syn/S02.html#Built-In_Data_Types>
{{*}} within a version number functions as a wildcard
^ Operators containing this character
{{*=}} mutant assignment form of multiplication
{{** and **=}} can be used like you always have, for exponentiation
{{**}} just about anywhere else is a multidimensional whatever (see above)
{{.*}} "calls all methods"<http://perlcabal.org/syn/S03.html#Method_postfix_precedence> if there are duplicate method names
{{[*-1]}} as an array index not special syntax but is legal use of "whatever" to get at the last element of an array.
^ When used inside regexes
{{* and *?}} as a "0 or more" repeat count
^ Special Variables
^ As an adverb
^ Other Uses
^ Hyper operator and meta operator restrictions
^ Old, deprecated, or other language uses
