merge same name text files with add only option

[face]

i want to merge folder1/textfile.txt with folder2/textfile1.txt with an add/insert only lines option from folder2/textfile1.txt to folder1/textfile.txt

it shouldn't replace, delete or edit existing textfile1 text lines

[SmOke_N]

FileReadToArray

FileWrite

Not sure your code and or explanation helps more than that offering.

[TheSaint]

As SmOke_N said, and without any code, all we can offer, is you read about those commands in the Help file.

If you struggle with the concept of arrays, then also look at FileOpen, FileRead and the switches (parameters) for those and FileWrite. Those switches are vitally important to avoid overwriting.

[computergroove]

I made this (I couldn't test it so I don't know if it works at all) but I got stuck on what you mean by merge or merge by line. Do you know what line you want to merge or are you looking for a GUI that will allow you to enter that data and maybe show you the data and the line so you can tell the script what lines from file 2 to merge?

#include <array.au3>

GLobal $File1Location = (@ScriptDir & "\folder1\textfile1.txt")
Global $File2Location = (@ScriptDir & "\folder2\testfile1.txt");<- is the 1 in the file name a typo on your part in your original post?
Global $aArray1[0];file 1 contents
Global $aArray2[0];file 2 contents

$File1Contents = _FileReadToArray($File1Location,$aArray1,"",@CRLF)
$File2Contents = _FileReadToArray($File2Location,$aArray2,"",@CRLF)