Bug? [SOLVED] regex.split failure

[sorex]

Hello,

for some reason this fails in B4i while it worked fine in B4A.

data=Regex.Split("",num)

num is for example "0200"

it works fine when using 0,2,0,0 & "," as seperator tho but "" should work aswell.


the log gives

Error occurred on line: 196 (gameclass)
Error Domain=NSCocoaErrorDomain Code=2048 "The operation couldn’t be completed. (Cocoa error 2048.)" UserInfo=0x145f1b60 {NSInvalidValue=}
Stack Trace: (
  CoreFoundation  <redacted> + 154
  libobjc.A.dylib  objc_exception_throw + 38
  CoreFoundation  <redacted> + 0
  CLAUStrophoba  +[B4IRegex getPattern::] + 536
  CLAUStrophoba  -[B4IRegex Split2:::] + 126
  CLAUStrophoba  -[B4IRegex Split::] + 80
  CoreFoundation  <redacted> + 68
  CoreFoundation  <redacted> + 282
  CLAUStrophoba  +[B4I runDynamicMethod:method:throwErrorIfMissing:args:] + 1928
  CLAUStrophoba  -[B4IShell runMethod:] + 496
CLAUStrophoba  -[B4IShell raiseEventImpl:method:args::] + 1846
CLAUStrophoba  -[B4IShellBI raiseEvent:event:params:] + 1316
CLAUStrophoba  __33-[B4I raiseUIEvent:event:params:]_block_invoke + 74
libdispatch.dylib  <redacted> + 10
libdispatch.dylib  <redacted> + 22
libdispatch.dylib  <redacted> + 254
CoreFoundation  <redacted> + 8
CoreFoundation  <redacted> + 1300
CoreFoundation  CFRunLoopRunSpecific + 522
CoreFoundation  CFRunLoopRunInMode + 106
GraphicsServices  GSEventRunModal + 138
UIKit  UIApplicationMain + 1136
CLAUStrophoba  main + 116
libdyld.dylib  <redacted> + 2
)

 

[LucaMs]

"" without a space?

If so, according to "the logic" it should return an array with a single element, "0200"

(I have not B4I and not tried with B4A)


[without a space it is like passing a null parameter, I think].

 

[sorex]

no, "" means split on every character.

 

[sorex]

I could use charat but I apply a lot of math with those values and charat doesn't seem to cast right from string to my int and won't compile so I need to change a lot more than with my regex.split("",var) solution.

 

[LucaMs]

no, "" means split on every character.

More precisely, it is what you would like it meant, but I fear that it is not so.

 

[sorex]

I used this trick in several languages so it's not my own invention

also... there is a difference between undefined, null and ""

 

[LucaMs]

I tried using B4A and the empty string works as you want, but the array must be of type string.

(B4A code, of course)

Dim Text As String = "0200"
Dim A() As String = Regex.Split("", Text)
For i = 0 To A.Length - 1
    Log(i & " " & A(i))
Next
  
Dim B(a.Length) As Byte
For i = 0 To A.Length - 1
    B(i) = A(i)
Next

?

 

[sorex]

flash actionscript: Splits a String object into substrings by breaking it wherever the specified delimiter parameter occurs and returns the substrings in an array. If you use an empty string ("") as a delimiter, each character in the string is placed as an element in the array.


javascript:
The split() method is used to split a string into an array of substrings, and returns the new array.

Tip: If an empty string ("") is used as the separator, the string is split between each character.


and so on

 

[sorex]

I tried using B4A and the empty string works as you want, but the array must be of type string.

right, it works fine in B4A as I said in my initial post.

it might be an IOS limitation.

 

[LucaMs]

I don't know using b4i, but "data" should be an array of strings, using b4a; perhaps even with b4i?

 

[sorex]

bummer...


The separator string can't be blank. If you need to separate a string into its individual characters, just loop through the length of the string and convert each char into a new string:

NSMutableArray *characters = [[NSMutableArray alloc] initWithCapacity:[myString length]];
for (int i=0; i < [myString length]; i++) {
NSString *ichar = [NSString stringWithFormat"%c", [myString characterAtIndex:i]];
[characters addObject:ichar];
}

 

[sorex]

and like I said I need other extra code to get the casting right.

it can be done like this unless Erel has some more decent/elegant method

tmpstring=cartypedata.charat(0) 'grab value
xoffset=tmpstring 'cast to int as immediate cast with charat fails (won't compile)

 

[LucaMs]

Fortunately I do not use iOS , so I can not help you, sorry.

 

[sorex]

no problem, Luca.

 

[Erel]

The correct way to iterate over the string characters:

Dim s As String = "SdfsdfsdF"
For i = 0 To s.Length - 1
   Dim c As Char = s.CharAt(i)
   Log(c)
Next

 

[sorex]

Yes, that's how I solved it last night.

You can forget/drop this issue.