Comment by father_of_two

11 years ago

seq has the -s flag which voids the need of the paste for that command:

  $ seq -s + 10 20
  10+11+12+13+14+15+16+17+18+19+20

But I agree that the paste is very useful.

  # a few random samples for an IN SQL statement
  $ shuf -i 1-500000 -n 5 | paste -s -d ,
  371492,250061,266669,455846,295852

  # we can even get PI
  $ ( seq -s + -f '4/%g' 1 4 100000 && seq -s - -f '4/%g' 3 4 100000 ) | paste -s -d - | bc -l
  3.14157265358979523735

1 comment

father_of_two

schoen 11 years ago

There is a faster way to get pi in bc:

  echo '4*a(1)' | bc -l

(That is, 4×arctan(1)=4×π/4=π.) But your way is truly an awesome use of Unix!