routine repeated
Documentation for routine repeated
assembled from the following types:
class Any
From Any
(Any) method repeated
Defined as:
multi method repeated()multi method repeated( :!, :! )multi method repeated( :! )multi method repeated( :! )
Similarly to unique
, finds repeated elements in values
(as a routine) or in the object, using the :as
associative argument as a normalizing function and :with
as equality function.
<1 -1 2 -2 3>.repeated(:as(),:with(&[==])).say; # OUTPUT: «(-1 -2)»(3+3i, 3+2i, 2+1i).repeated(as => *.re).say; # OUTPUT: «(3+2i)»
It returns the last repeated element before normalization, as shown in the example above. See repeated
for more examples that use its sub form.
language documentation Independent routines
From Independent routines
(Independent routines) routine repeated
Defined as:
multi sub repeated(+values, |c)
This returns a sequence of repeated values from the invocant/argument list. It takes the same parameters as unique, but instead of passing through any elements when they're first seen, they're only passed through as soon as they're seen for the second time (or more).
Examples:
say <a a b b b c c>.repeated; # OUTPUT: «(a b b c)»say <a b b c c b a>.repeated; # OUTPUT: «(b c b a)»say <a A B b c b C>.repeated(:as()); # OUTPUT: «(A b b C)»my = %(a => 42), %(b => 13), %(a => 42);say .repeated(:with(&[eqv])) # OUTPUT: «({a => 42})»
As in the case of unique
the associative argument :as
takes a Callable that normalizes the element before comparison, and :with
takes a the equality comparison function that is going to be used.