Compare text and show differences?

[notsure]

Hi.

 

I'm trying to compare 2 texts with eachother but im struggling a little.

 

I have 1 file for today ($array) and 1 file from yesterday ($filecontents), those should be compared to see whats being added today.

 

Todays file example:

12345
23456
34567

 

Yesterdays file example:

12345
23456
34567
45678

 

I tried something like this, it works but its ugly, besides, i only have to see whats being added.

 

$file = fileopen ("test.txt")
$filecontents = readfile ($file)
for $x = 1 to ubound($array) - 1
 if stringinstr($filecontents, $array[$x]) > 0 then
  stringreplace($filecontents, $array[$x], "")
 endif
next

 

this shows whats "left" after replacing the whole array with nothing... but there should be a better way to do this i guess?

 

Any thoughts?
Thanks

[water]

IIRC there are some threads on the forum about file comparison scripts.
Maybe you could grab some ideas/code from those?

[mikell]

If the newly added part is just an addition to the old file text, this should work

$res = StringReplace(FileRead("today.txt"), FileRead("yesterday.txt"), "")
Msgbox(0,"", $res)

 

[notsure]

I can't test this here, but what would $res return? If it returns "45678"  you're my man.

[mikell]

... assuming of course that there was a typo in post #1 and that "45678" was added in today.txt file, not in yesterday 

[notsure]

12 hours ago, mikell said:

Its also purpose that addition may occur in the middle of the data... so this wouldnt work for that ;(

Edited June 17, 2016 by notsure