Very rough draft (pseudocode) 
sub wordify($string) {
    my $results = [];
    $min_end = length($string)
    for $pos (0 .. $min_end) {
        for $len (1 .. length($string)) {
            $word = substr($string, $pos, $len)
            if exists($dictionary{$word}) {
                $min_end = $pos+$len if $pos+$len < $min_end
                $prefix = substr($string, 0, $pos) . " " . $word # nee
+ds special treatment for $pos = 0
                $endings = wordify(substr($string, $pos+1))
                push(@$results, map("$prefix $_", @$endings))
            }
        }
    }
    return [$string] unless @$results 
    return $results
}

[download]
Hope I don't get it all wrong, it's quite late here in Europe. I'd definitely use dynamic programming to save the partial results.

In reply to Re: Challenge: "Words" In A String by pjotrik
in thread Challenge: "Words" In A String by Limbic~Region

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