Built-in functions #2

✓

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 = 1..6;
my $value = @source.grep(* %% 2).map(* ** 2).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	`Array`	`Array`
Code form .raku	`$[4, 16, 36]`	`$[4, 16, 36]`
String .Str	`4 16 36`	`4 16 36`
True or false .Bool	`True`	`True`

builtins-v1 · seed 41 · recorded 2026-09-29 with Rakudo 2026.08 and Raku++ 5.0.0-g312cde8e · Source on GitHub ↗