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open(PROG_FOR_READING_AND_WRITING, "| some program |")
Can't do bidirectional pipe at -e line 1.
By rote learning.
Via Genetic memory.
It's provided by my firmware.
I just remember them.
Thirty days hath September
My computer gets it right, usually.
I just ask someone else.
Someone punches me on the first of the month.
Results (193 votes),