SPUG: "Programming Challenge"
sthoenna at efn.org
Wed Dec 17 19:12:49 CST 2003
Avoid loops at all costs (or keep them in C where they belong):
print encode("UCS-2LE", $LSB) ^ encode("UCS-2BE", $MSB);
This works by "encoding" each string as little- or big-endian 2 bytes
per character (so each string will have all the odd or all the even
bytes null) then stringwise-xoring them together.
Using syswrite may be faster.
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