I don't use perl for things for which there are standard unix utils. 

$ cat text
first
second
third
fourth
fifth
sixth
seventh
eighth
$ cat nums
1
4
6
7
$ ed -s text < nums
first
fourth
sixth
seventh

[download]

Update: this sucks if the text file is too large to load in memory. In that case,

Update: here's a perl solution too: 

perl -we 'open N, "<", shift or die; $p = 0; while(defined($n = <N>)) 
+{ $s = <> for $p + 1 .. $n + 0; print $s; $p = $n; }' nums text

[download]

Update: if anyoune knows how to convert the above snippet so that it uses either $. or IO::Handle::input_line_number, please reply me, cause I can't figure out how to do that.

In reply to Re: printing specific lines by ambrus
in thread printing specific lines by Anonymous Monk

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