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take
Combined from primary sources listed below.

In Mu§

See primary documentation in context for routine take. 

sub    take(\item)
method take()

The sub takes the given item and passes it to the enclosing gather block.

#| randomly select numbers for lotto
my $num-selected-numbers = 6;
my $max-lotto-numbers = 49;
gather for ^$num-selected-numbers {
    take (1 .. $max-lotto-numbers).pick(1);
}.say;    # six random values

The method returns the invocant in the enclosing gather block.

sub insert($sep, +@list) {
    gather for @list {
        FIRST .take, next;
        take slip $sep, .item
    }
}

say insert ':', <a b c>;
# OUTPUT: «(a : b : c)␤»