Rahul comment on Set Operations in the Unix Shell

The competent programmer is fully aware of the strictly limited size of his own skull; therefore he approaches the programming task in full humility, and among other things he avoids clever tricks like the plague.

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Rahul Permalink

March 18, 2010, 10:23

Set Cartesian Product. Find A x B
|cat N
1
2
3
|cat A
a
b
c
d

|cat A |while read a ; do
cat N |sed -e "s/./& $a/g"
done

Oh well, at-least one while is removed. I could have done better with xargs and removed the second while too, but it isn't like find unfortunately in that it doesn't allow me to embed pipelines in the arg

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