Code at #3 returns T. Is it correct?
Dear kpblc,
eg: data.txt
ABCDEF123
0
3012400
3024000
If I want only change the value of Second row , Other values unchanged
Have a quick way ? Thanks.
You would need to read & re-write the file, e.g.:
Very Thanks , Lee .
I think the wrong,I thought , if the value unchange, so no need rewrite .
Lee ,Good function , (setq lin (1- lin)) good idea.
I learned a new function "foreach" , foreach is like DOS command " FOR"