in reply to Re: Golf: Length of longest line in a file
in thread Golf: Length of longest line in a file

Excellent.

Please correct me if I am wrong, but the following code ... 

    $s^=$_

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expands to: 

    $s = $s ^ $_;

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So, this takes advantage of the string xor operator's ability to increase the shorter string to match the length of the longer string. Then it returns a string whose length is that of the longer of the 2 strings. (Bitwise String Operators)

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Re^3: Golf: Length of longest line in a file (explanation)
by BrowserUk (Patriarch) on Jul 04, 2010 at 02:16 UTC

    Correct. |= works also, but not &=.

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