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1992-10-18
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155 b
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6 lines
open(FOO, "|tr '[a-z]' '[A-Z]'");
open(FOO, "|-") || exec 'tr', '[a-z]', '[A-Z]';
open(FOO, "cat -n file|");
open(FOO, "-|") || exec 'cat', '-n', 'file';