Perl 6 Deep Dive

Sequence operator

As an infix operator, the three dots are the sequence operator. Perl 6 contains some amount of built-in magic that does what you mean. Let's consider a few examples with the ... operator:

say 5 ... 10;say 'a' ... 'f';

The preceding two lines print the following sequences:

(5 6 7 8 9 10)(a b c d e f)

The result of the ... operation is a sequence. Do not mix this operator with the .. operator which creates ranges.

If you assign the result to a list, then the operators may be interchangeable:

my @a = 5...10;my @b = 5..10;say @a; # [5 6 7 8 9 10]say @b; # [5 6 7 8 9 10]

The sequence operator can demonstrate a more complicated behavior:

my @squares = 1, 2, 4 ... 64;say @squares;

In this example, using the pattern, the ... operator ...