Why can't we append Null to a string?

[TheDcoder]

Here is some code:

ConsoleWrite("Test" == "Test" & Null) ; This should be False by theory, but it is True in AutoIt
Sleep(1000) ; Sometime for you to read the result

 

Is this a bug or expected behaviour? Thanks in Advance, TD

[water]

According to the help file keyword Null always evaluates to Null or an empty string:

"Null evaluates only to Null, still in mathematical operations this keyword has value of 0, and as string it has no value (empty string)."

So - as always - the help file is your friend

[water]

What do you need it for? What do you expect?
Do you want to terminate a string with a null character?

[TheDcoder]

Forgot about the helpfile, Thanks @water!

[TheDcoder]

@water I need to convert a string (with Nulls as delimiters) to Base64.

[water]

Glad to be of service I always like to solve such easy challenges

[jchd]

Null has a broad semantic. It essentially means "I don't know" value (or rather "non value"). That's pretty formal in SQL but in AutoIt Null can get converted to some other type as Water quoted.

I believe you're confusing the Null value (keyword) with the ANSI control character NUL which is 0x00 exactly with string datatype. So you seem to want something like $sMyString &= Chr(0)

Edited April 6, 2016 by Jos
Changed Asc to Chr

[TheDcoder]

@jchd Ah, no. I just tried it...

[czardas]

1 hour ago, TheDcoder said:

@jchd Ah, no. I just tried it...

Tried what?

#include <Array.au3>
Local $sString = 'a' & Chr(0) & 'b' & Chr(0) & 'c'
_ArrayDisplay(StringSplit($sString, Chr(0), 2))

 

[TheDcoder]

Sorry @czardas but I am a little confused, please refer to this topic:

 

[Jos]

Just now, TheDcoder said:

but I am a little confused

Only a little ?

Closing this thread to avoid 2 discussions on the same thing.