相关疑难解决方法(0)

是否安全,在promises之间共享数组,就像我在下面的代码中所做的那样？

#!/usr/bin/env perl6
use v6;

sub my_sub ( $string, $len ) {
    my ( $s, $l );
    if $string.chars > $len {
        $s = $string.substr( 0, $len );
        $l = $len;
    }
    else {
        $s = $string;
        $l = $s.chars;
    }
    return $s, $l;
}

my @orig = <length substring character subroutine control elements now promise>;
my $len = 7;
my @copy;
my @length;
my $cores = 4;
my $p = @orig.elems div $cores;
my @vb = ( 0..^$cores ).map: …