PBWin one by one each character

[Eduardo Miranda Alvarez]

#COMPILER PBWIN 9
#DIM ALL
' An example is worth a thousand words
'-------------------------------------------------------------------------------------------
'assuming --> {1234,Q145,Sales,Cost,$120.30} etc
'In an array that contains numbers and letters {ABC12} need to find only numbers{$1234.50}.
'It is what it claims this little routine
' Best idea welcome
' sorry for my bad English
'-------------------------------------------------------------------------------------------


'Esta funcion determina si puede usarse como numeral o no en una frase dada
'al momento que encuentra un elemento que no es numero o punto se sale
'dando funcion 0 , de lo contrario function -1
'no admite espacios daria Error no--> CHR$(32)
'-------------------------------------------------------------------------------------------

FUNCTION CaptSiEsNumOString(BYVAL Need_Num AS STRING) AS LONG
' This routine can be varied to specific needs
LOCAL char AS STRING
LOCAL y AS LONG
' del 0 al 9 CHR$(48,57)
FOR y = 1 TO LEN(Need_Num)
char$ = MID$(Need_Num,y,1) 'one by one each character
IF char => CHR$(48) AND char=<CHR$(57) OR char=CHR$(46) OR char =CHR$(36) THEN
FUNCTION = -1
ELSE
'It has elements that do not do Number
FUNCTION= 0
EXIT FUNCTION
END IF
NEXT y
END FUNCTION

'------------------------------------------------------------------------------


FUNCTION PBMAIN () AS LONG
LOCAL Result AS LONG
LOCAL Numeral AS STRING
'Example 1
numeral = "$459.60" '<-- we need this format
'Example 2
' numeral = "#120" 'or <-- this no
CaptSiEsNumOString numeral TO result
IF result <>0 THEN
REPLACE ".." WITH "." IN Numeral ' detectar 2 puntos dejar uno
MSGBOX numeral +" is what I need",64,FUNCNAME$
ELSE
MSGBOX numeral +" has elements that do not do my Number",64,FUNCNAME$
END IF
END FUNCTION

[Petr Schreiber jr]

Here is version using PB VERIFY keyword:

#COMPILER PBWIN 9
#DIM ALL

FUNCTION CaptSiEsNumOString(BYVAL Need_Num AS STRING) AS LONG
  
  IF VERIFY(Need_Num, "0123456798.$") = 0 THEN
    FUNCTION = -1
  ELSE
    FUNCTION = 0
  END IF

END FUNCTION

'------------------------------------------------------------------------------


FUNCTION PBMAIN () AS LONG
  LOCAL Result AS LONG
  LOCAL Numeral AS STRING
  
  ' -- Example 1
  Numeral = "$459.60" '<-- we need this format
  
  ' -- Example 2
  'Numeral = "#120" 'or <-- this no
  
  result = CaptSiEsNumOString(Numeral)

  IF result <> 0 THEN
    ' [EN] detect 2 or more dots, reduce them to single one
    ' [SP] detectar 2 o mas puntos, dejar uno
    WHILE INSTR(Numeral, "..")
      REPLACE ".." WITH "." IN Numeral
    WEND

    MSGBOX numeral +" is what I need", %MB_ICONINFORMATION OR %MB_OK,FUNCNAME$
  ELSE
    MSGBOX numeral +" has elements that do not do my Number", %MB_ICONINFORMATION OR %MB_OK,FUNCNAME$
  END IF
END FUNCTION

Thanks for you code,
Petr

P.S. Little tip - when posting code, put it between CODE tags, it will preserve indenting.

[Eduardo Miranda Alvarez]

'Sorry, I will try to explain in English that I did this routine

Hi Petr Schreiber jr


'Sorry, I will try to explain in English that I did this routine
'I had to solve a problem with different price lists that have different positions
'for the items found there.
'I wanted to make one that was capable ListView
'to detect the position of the charge automatically.
'and this routine is giving me good result . I need is to find the first element of
'column xx, analyze it and see if it is I need --> example the cost and recalculate

'This routine is designed for a specific search in the special case where there are several
'elements which have a different format but we know and is defined as fields Lisview instance
'{Part Number, Description,' Cost} and used for different lists with different position
'elements and we need to capture the cost in each list to recalculate .
'And we know that the cost column is different but in the same Listview.
'The idea is to automatically detect which column is the cost in different lists Providers

'I upload to Power Basic detect if someone needs something like this.
'Oh ... if there is a better idea.
'Both this forum has given me that I must try to return something

'I hope you understand my bad English



'SMALL CHANGE
'===============================================================================

FUNCTION CaptSiEsNumOString(BYVAL Need_Num AS STRING) AS LONG
' This routine can be varied to specific needs
LOCAL char AS STRING
LOCAL y AS LONG
' del 0 al 9 CHR$(48,57)
FOR y = 1 TO LEN(Need_Num)
char$ = MID$(Need_Num,y,1) 'one by one each character
' This routine can be varied to specific needs
'Small change is detected if the first element of Dollar sign '$' CHR$(36) if not in that position
'is not cost

IF y=1 AND char =CHR$(36) _ <---------- detected if the first element of Dollar
OR char => CHR$(48) AND char=<CHR$(57) OR char=CHR$(46)OR CHAR =CHR$(32) THEN

'IF char => CHR$(48) AND char=<CHR$(57) OR char=CHR$(46) OR char =CHR$(36) THEN
FUNCTION = -1
ELSE
'It has elements that do not do Number
FUNCTION= 0
EXIT FUNCTION
END IF
NEXT y
END FUNCTION

Eduardo Miranda

[Petr Schreiber jr]

Hi Eduardo,

so you do early test whether first character is $, to exclude it from further search, that is smart! Could be done as this too (renamed to IsPrice):

' -- Transparent syntax of bulletproof version :)
FUNCTION IsPrice(BYVAL StringForm AS STRING) AS LONG

  ' -- Does not start with dollar? Then it is no price
  IF LEFT$(StringForm, 1) <> "$" THEN
    FUNCTION = 0
    EXIT FUNCTION
  END IF
  
  ' -- Remove the $ in temp string
  StringForm = LTRIM$(StringForm, "$")
  
  ' -- Remove zeros from the end - they are not necessary
  StringForm = RTRIM$(StringForm, "0")
  
  ' -- Test just for value
  DIM Value AS CURRENCY
  
  ' -- String to value
  Value = VAL(StringForm)
  
  ' -- Is string to value equal to original string?
  IF FORMAT$(Value) <> StringForm THEN
    FUNCTION = 0
    EXIT FUNCTION
  END IF
  
  ' -- Otherwise it is ok!
  FUNCTION = -1
  
END FUNCTION

Petr

P.S. I attached image of how to use CODE tag

[Michael Mattias]

See also: RETAIN$() function.

[Eduardo Miranda Alvarez]

'char by char

'char by char
'Of course we could use char by char to find a space in a string and many other uses

#COMPILE EXE
#DIM ALL

FUNCTION Char_by_Char(BYVAL iString AS STRING) AS STRING
LOCAL char AS STRING
LOCAL y ,cuente AS LONG
LOCAL uno , dos AS STRING
LOCAL iArray() AS STRING
' This routine can be varied to specific needs
DIM iArray(20)
FOR y = 1 TO LEN(iString)
char$ = MID$(iString,y,1) 'one by one each character
IF char <> CHR$(32) THEN
iArray(cuente)= iArray(cuente)+char
ELSE
INCR cuente
END IF
NEXT y
FOR y = 0 TO UBOUND(iArray(1))
dos = dos & $CRLF & iArray(y)
NEXT y
MSGBOX dos ,64,FUNCNAME$

END FUNCTION

'----------------------------------------------------------------------------------------

FUNCTION PBMAIN () AS LONG
LOCAL istring AS STRING
istring="'Of course we could use char by char to find a space in a string and many other uses "
Char_by_Char(istring)

END FUNCTION

[Petr Schreiber jr]

If you like testing for ASCII values, it might become slightly inefficient to use repeated calls to CHR$ and MID$. It is possible to use one very ellegant PB technique instead - overlaying BYTE array over string. It is still very clear to understand, and faaast.

FUNCTION <CustomNameHere>(BYVAL inString AS STRING)
  
  REGISTER i AS LONG    ' -- Fast loops
  LOCAL strLen AS LONG
  strLen = LEN(inString)
  
  ' -- Overlay BYTE (0..255) over STRING results in
  ' -- having the ASCII code immediately
  DIM ASCII(1 TO strLen) AS BYTE AT STRPTR(inString)
    
  FOR i = 1 TO strLen
    ' -- Catching spaces for example
    IF ASCII(i) = 32 THEN ... ' This simple, instead of IF MID$(strLen, i, 1) = CHR$(32)
    
    ...
  NEXT

  ...
  
END FUNCTION

[Eduardo Miranda Alvarez]

char by char

It is another good option, I think this forum is the option to teach what we know and learn what I do not know
Thanks for showing me another option

Character by character That is the question?

Eduardo Miranda