11/15 What's the best way to print out a certain line number in a file?
The best I could come up with is something like:
head -(line # you want) filename | tail -1
\_ Actually, i think ED is the answer
\_ close.
\_ echo number|ed filename
But it will print the number of bytes in the file when
ed starts up. ED is the STANDARD! Text processor. -geordan
\_ sed -n <line#>p < filename
\_ thx!
\- hola, i think sed is a better tool than pl in this case
although a speed check would be interesting.
more generally sed -n 'X,Yp' will print out the inclusive
range from [X-Y]. On a big file this may be slightly better
although perhaps not a real big deal on mondern machines:
sed 'Xq;d' ... you do get more "sed intimidation points"
for the latter as well. --psb
\- i ran some tests on a sun blade 1000 lookin for a pretty
deep line on a medium big file ... about 60million lines.
here are the relative speeds:
wc -l: 1
sed: 1.03
perl4: 1.59
perl5: 3.85
stragely some old intuition about sed doesnt seem to
apply any more ... maybe it is because memory has
grown so much compared to typical files. --psb
\_ You *know* there's a 1 line perl answer to this....
\_ perl -ne 'print if $.==number' filename
-geordan
\_ ah! but where is the ocaml answer for this? |