Built-in functions #4

✓

Raku++ 5.0.0-g312cde8e prints exactly what Rakudo 2026.08 prints

This is valid Raku: Rakudo 2026.08, the reference compiler, runs it without complaint, and the two outputs match character for character.

The program

The first lines compute $value. The last four lines are the same in every program: they print what kind of thing $value is, how it looks as code, as a string, and as true or false.

my @source = (4, 2, 4, 3, 2);
my $value = (@source.unique.Array, @source.repeated.Array);

sub safe-str($v) { my $s = try $v.Str; $s.defined ?? $s !! '<undefined>' }
say "TYPE\t" ~ $value.^name;
say "RAKU\t" ~ $value.raku;
say "STR\t" ~ safe-str($value);
say "BOOL\t" ~ $value.Bool;

Run executes the program in your browser, with the Raku++ build this site ships. Edit it and try variations.

What each compiler printed

	Rakudo 2026.08	Raku++ 5.0.0-g312cde8e
Type .^name	`List`	`List`
Code form .raku	`$([4, 2, 3], [4, 2])`	`$([4, 2, 3], [4, 2])`
String .Str	`4 2 3 4 2`	`4 2 3 4 2`
True or false .Bool	`True`	`True`

builtins-v1 · seed 43 · recorded 2026-09-29 with Rakudo 2026.08 and Raku++ 5.0.0-g312cde8e · Source on GitHub ↗