raku-rosettacode/programming_tasks/A/Apply_a_callback_to_an_array.md

Apply a callback to an array

sub function { 2 * $^x + 3 };
my @array = 1 .. 5;
 
# via map function
.say for map &function, @array;
 
# via map method
.say for @array.map(&function);
 
# via for loop
for @array {
    say function($_);
}
 
# via the "hyper" metaoperator and method indirection
say @array».&function;
 
# we neither need a variable for the array nor for the function
say [1,2,3]>>.&({ $^x + 1});