Raku Documentation
routine skip
Documentation for routine skip assembled from the following types:
module Test
From Test
(Test) sub skip
Defined as:
multi sub skip() multi sub skip($reason, $count = 1)
Skip $count tests, giving a $reason as to why. By default only one test will be skipped. Use such functionality when a test (or tests) would die if run.
sub num-forward-slashes($arg) { ... } ;
if $*KERNEL ~~ 'linux' {
is num-forward-slashes("/a/b"), 2;
is num-forward-slashes("/a//b".IO.cleanup), 2;
}
else {
skip "Can't use forward slashes on Windows", 2;
}
Note that if you mark a test as skipped, you must also prevent that test from running.
class Any
From Any
(Any) method skip
Defined as:
multi method skip() multi method skip(Whatever) multi method skip(Callable:D $w) multi method skip(Int() $n)
Creates a Seq from 1-item list's iterator and uses Seq.skip on it, please check that document for real use cases; calling skip without argument is equivalent to skip(1).
Calling it with Whatever will return an empty iterator:
say <1 2 3>.skip(*); # OUTPUT: «()»
The multi that uses a Callable is intended mainly to be used this way:
say <1 2 3>.skip(*-1); # OUTPUT: «(3)»
Instead of throwing away the first $n elements, it throws away everything but the elements indicated by the WhateverCode, in this case all but the last one.
class Seq
From Seq
(Seq) method skip
Defined as:
multi method skip(Int() $n = 1 --> Seq)
Returns a Seq containing whatever is left of the invocant after throwing away $n of the next available values. Negative values of $n count as 0. Also can take a WhateverCode to indicate how many values to skip from the end. Will block on lazy Seqs until the requested number of values have been discarded.
say (1..5).map({$_}).skip; # OUTPUT: «(2,3,4,5)»
say (1..5).map({$_}).skip(3); # OUTPUT: «(4,5)»
say (1..5).map({$_}).skip(5); # OUTPUT: «()»
say (1..5).map({$_}).skip(-1); # OUTPUT: «(1,2,3,4,5)»
say (1..5).map({$_}).skip(*-3); # OUTPUT: «(3,4,5)»
class Supply
From Supply
(Supply) method skip
method skip(Supply:D: Int(Cool) $number = 1 --> Supply:D)
Returns a new Supply which will emit all values from the given Supply except for the first $number values, which will be thrown away.
my $supplier = Supplier.new;
my $supply = $supplier.Supply;
$supply = $supply.skip(3);
$supply.tap({ say $_ });
$supplier.emit($_) for 1..10; # OUTPUT: «45678910»