copy lines from a text file to another - batch-file

Question

i have two text files
file1 has the following lines
line1
line2
hello-hai-1
hello-2-hai
3-hai-hello
hello
and file 2 has
line4
line3
hello-hai-5
hello-7-hai
6-hai-hello
hai
hello-4
what i want to do is copy all the lines which contain both hello and hai in file2 and overwrite it on those lines in file1, the no. of lines may or may not be equal. but all the hello-hai lines are together in both files
the current code i use is
setlocal enabledelayedexpansion
for /f "tokens=1*delims=:" %%i in ('^<file2 essentials\findstr.exe /n "hello"') do set "#%%i=%%j"
(for /f "delims=" %%i in (file1) do (
set "line=%%i"
if not "!line!"=="!line:hello=!" (
if not "!line!"=="!line:hai=!" (
if not defined flag (
for /f "tokens=1*delims==" %%a in ('set "#"') do echo(%%b
set "flag=true"
)
) else echo !line!
) else echo(!line!
))>output.txt
this copies all hello lines over the hello-hai lines in file1, i want to know how to add the word hai to the search in first file

Answer 1

#echo off
setlocal EnableDelayedExpansion
rem Find lines with both strings in file2
set i=0
for /F "delims=" %%a in ('findstr "hello" file2 ^| findstr "hai"') do (
set /A i+=1
set "file2[!i!]=%%a"
)
rem Merge file1 with the found lines in file2
set i=0
(for /F "delims=" %%a in (file1) do (
set "line=%%a"
if "!line:hello=!" neq "!line!" (
if "!line:hai=!" neq "!line!" (
set /A i+=1
for %%i in (!i!) do echo !file2[%%i]!
) else (
echo !line!
)
) else (
echo !line!
)
)) > output.txt
EDIT: New version added
Previous solution achieve a line-by-line replacement that works even if the matching lines are not together in any file (file merge), but requires that the number of matching lines be the same in both files. The new simpler version below works in the way requested by the OP:
#echo off
setlocal EnableDelayedExpansion
(for /F "delims=" %%a in (file1) do (
set "line=%%a"
if "!line:hello=!" neq "!line!" (
if "!line:hai=!" neq "!line!" (
if not defined flag (
findstr "hello" file2 | findstr "hai"
set flag=true
)
) else (
echo !line!
)
) else (
echo !line!
)
)) > output.txt

Answer 2

Try this:
#echo off &setlocal
set "tf1=%temp%\~%random%1"
set "tf2=%temp%\~%random%2"
set "tf3=%temp%\~%random%3"
set "tf4=%temp%\~%random%4"
set "pt=hello"
set "pu=hai"
<file1 findstr /lin "%pt%">"%tf1%"
<"%tf1%" findstr /li "%pu%">"%tf2%"
<file2 findstr /li "%pt%">"%tf3%"
<"%tf3%" findstr /li "%pu%">"%tf4%"
for /f "usebackqdelims=:" %%i in ("%tf2%") do (
if not defined st set "st=%%i"
set "fi=%%i"
)
set /a st-=1
<file1 (
for /l %%i in (1,1,%st%) do (
set "line="
set/p "line="
setlocal enabledelayedexpansion
echo(!line!
endlocal
))>"%tf1%"
<file1>"%tf3%" more +%fi%
copy /a "%tf1%"+"%tf4%"+"%tf3%"=output.txt>nul
del "%temp%\~*"
type output.txt
output is:
line1
line2
hello-hai-5
hello-7-hai
6-hai-hello
hello

Answer 3

#ECHO OFF
SETLOCAL
SET searching=Y
(
FOR /f "delims=" %%i IN (file1.txt) DO (
ECHO %%i|FIND "hello"|FIND "hai" >NUL
IF ERRORLEVEL 1 (ECHO(%%i) ELSE (
IF DEFINED searching TYPE "file2.txt"|FIND "hello"|FIND "hai"
SET "searching="
)
)
)>output.txt
TYPE output.txt
GOTO :EOF
Here's a version without tempfiles. It simply reproduces lines from file1 that don't contain BOTH of the target strings. When BOTH are found in the same line, it outputs all of those lines in file2 that contain both strings. The searching flag is used to ensure that the file2 lines are only output once.
It won't reproduce blank lines or lines that begin ;. Could be made to do so if required.