routine repeated
Documentation for routine repeated
assembled from the following types:
class routines
From routines
(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.
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.