How could I extract the beginning part of a string?
eg: Str1="PTR 8,5"
I want to know that the first three characters are PTR.

Do you actually need to extract the first three characters as a substring, or are you merely interested in checking if it starts with a specific three-character-long string?

---

If it's the latter, Matrefeytontias is partially correct in suggesting that there's a command for that. The Equ►String() command checks if two strings passed as arguments are equal, returning zero if so and nonzero otherwise. The reason why he's only partially correct is because, as you can see from that description, the command isn't made to check if one string starts with another. But if you're comfortable using the technically undefined return value when the strings aren't equal, you can check this. With the current implementation, when the two strings differ, the return value is actually a pointer to the first character in the second string that differs from the character at the same position in the first string. So the following code would work to check if a string starts with "PTR", but isn't guaranteed to work in future versions of Axe:

"PTR"→Str0
!If Equ►String(<string>,Str0)?-3-Str0
.Starts with "PTR"
End

For reference, the second line is an optimized version of:
If (Equ►String(<string>,Str0)=0) or (Equ►String(<string>, Str0)=(Str0+3)).

---

If it's the former, extracting a substring of predetermined length is somewhat straightforward, despite Axe lacking a built-in substring command. Extracting a substring simply comes down to copying the characters you want to a new area of memory and making sure the new substring data ends with a null terminator byte. So to extract a 3-byte substring from the front of a string, you'd need to reserve 4 bytes of memory and copy it, perhaps like this:

Copy(<string>,L₁,3)
0→{L₁+3}
.Substring at L₁


I don't know if I already asked but when I went through some pages of that topic, I didn't find that question so I guess I didn't ask ?

Would it be possible to have less syntax restrictions ? Example:
Copy(L6,Copy(L3,L6,96),192)

This example is something stupid I just coined but you get the idea.
This is currently impossible to write, "Cannot use here". But what if that's what I want to write and I know what I am doing ? Because I can understand that beginners could get problems writing this kind of stuff, but they would not write that kind of stuff so those restrictions are only annoying non-beginners.

If that's screen scrolling code, I didn't make it on purpose. But I don't think it is (or at least, if it's partially, it's not complete).

Is there any way to garbage collect in axe? My current program has to archive programs a lot and I want it to automatically garbage collect when necessary (like DoorsCS does).


Also, is there a way to change the size of a program without creating a new program and copying the old?


Thank in advance for your help 

I think this is done automatically in the "Archive" command. When necessary, the "GarbageCollect ? Yes/No" menu appears. I am not sure though but I think.

It brings up the menu. I want a way to skip the menu (because it messes up if the user clicks no) and garbage collect on its own

This can be done with MEMKIT (included in the zip) if your program is unarchived.

Hmm, I guess no way if its archived then?

It's not possible unless you use ASM. And even so, I don't know how you could do it ; you should ask KermM.