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I have a requirment when in i need to get the last N number of line from a file and do a comparision.... can u guide me on how to get the last N lines from a file
@echo off > newfile & setLocal enableDELAYedexpansion
set N=
for /f "tokens=* delims= " %%a in (myfile) do (
set /a N+=1
)
set /a X=!N!-10
set N=for /f "tokens=* delims= " %%a in (myfile) do (
set /a N+=1
if !N! gtr !X! echo %%a >> newfile
)
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Helping others achieve escape felicityM2
0 
Alternatively use the appropriate tool for the job. Tail.exe is available either as part of the Windows Server 2003 Resource Kit Tools from Microsoft, or the GNU Win32 port.
0 0
maybe to illustrate
for ( .... myfile ) do (
# set variable for 10 lines everytime
set var1
set var2
set var3
....
.....
set var10
)at the end of the loop, those vars will contain the last 10 lines...
0
Hi ghostdog,
Thanks
I gotta think about this
=====================================
Helping others achieve escape felicityM2
0
if you have an old edlin.com or edlin.exe, you can pipe
the following into it (from batchfile tail.bat which is its
own pipe, it goto's past the pipe data)
:batchfile tail.bat:
goto dd
#
-111,.d
e
:dd
edlin %1 < tail.bat(the "#" tells it goto the last line, then it "backs up"
11 lines, (the next blank line is important, be sure
to put it there)
then it deletes from 1 to "." which ref's the
line it's sitting on, then "e" saves the file.)
if you wanted to make the number of lines as a
variable quantity, you could use eko.com to put
the variable line-count data into a pipe file.
also, if using large files, you will have to buffer through
the file, which i will explain if any interest is expressed
in this post, otherwise i'll wait to see if any cares.
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