That's entirely valid. However, it really is worth noting to the reader that in Raku, unlike Perl, constants can be lexically scoped with my just like a variable. Thus, the following works as you'd expect:
my constant $A="bar";
sub foo {
my constant $A="foo";
say $A;
}
foo();
say $A;
The result is:
$ ./constant.raku
foo
bar
Inside of scopes where $A is already defined as a constant attempts to redefine $A will produce an error. It's worth mentioning this near ncitest.raku, where the first use of constants occurs in the guide. Given the importance of read-only variables to Functional Programming, it's worth reiterating in that section too.
In ncitest.raku a constant is defined like this:
That's entirely valid. However, it really is worth noting to the reader that in Raku, unlike Perl, constants can be lexically scoped with
myjust like a variable. Thus, the following works as you'd expect:The result is:
Inside of scopes where
$Ais already defined as a constant attempts to redefine$Awill produce an error. It's worth mentioning this near ncitest.raku, where the first use of constants occurs in the guide. Given the importance of read-only variables to Functional Programming, it's worth reiterating in that section too.