How about we lose another 7 characters :) 
sub invert {
    #23456789012345678901234567890
    grep/[^\Q@_\E]/,map{chr}1..255
}

[download]

cLive ;-)

updare - to summarize response to BrowserUK's comment - calling the sub in scalar context will automatically join the list into a scalar. Is that cheating? maybe :) - never mind, I was running the wrong test script lol :)

In reply to Re:^2 Golf: string complement by cLive ;-)
in thread Golf: string complement by japhy

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