How to remove all whitespaces from a string?

[Former Member]

I'm trying to conduct hash check on payment file to see if anyone has changed the payment file manually before signing it with a digital signature.

However when I download the payment file from the server some whitespaces go missing on the way to the client's computer. The problem is that a file that hasn't been modified in any way produces a different hash after signing. So I was thinking what if i removed all whitespaces (space, linefeed, carriage return, nbsp) from the file then maybe it finally calculates correct hash for both files. However I can't find any functionality that lets me remove all whitespace characters from the string. Alpha Conversion removes spaces from the end of the string but since I need to also remove spaces and line breaks from inside the string this isn't really an option. I would greatly appreciate if someone provided me with some information how to achieve this.

[Former Member]

Hi,

data: teststring type string .

replace all occurrences of cl_abap_char_utilities=>CR_LF in teststring with '' .

replace all occurrences of cl_abap_char_utilities=>NEWLINE in teststring with '' .

condense teststring.

For more options you can explore class CL_ABAP_CHAR_UTILITIES

regards,

Ashish Rawat

[paul_max1]

Hello Rauno,

Try with REPLACE ALL OCCURRENCES OF pattern IN variable WITH ''.

I hope that I understood well your question.

[SuhaSaha]

Hello Rauno,

since I need to also remove spaces and line breaks from inside the string this isn't really an option.

I think you can use the RegEx [[:space:]] to remove the "white-space characters" from your string.

BR,

Suhas

PS - You can play around with your RegEx in DEMO_REGEX_TOY & build the one which suits your requirement

[Former Member]

Hi ,

   Please try like this,

REPLACE ALL OCCURRENCES OF CL_ABAP_CHAR_UTILITIES=>newline in
   variable_name WITH ''.

Thanks,

Vijay.

[Former Member]

These are all good suggestions but afterall I went with something I made myself especially because I can be sure that this way all the unnecessary characters are removed and necessary characters remain:

len = strlen( initial_file ).

DO len TIMES.

     SUBTRACT 1 FROM len.

     IF 'ABCDEFGHIJKLMNOPQRSŠZŽTUVÕÄÖÜXY1234567890.,"<>?=-:/' CS initial_file+len(1).

          CONCATENATE initial_file+len(1) temp into temp.

     ENDIF.

ENDDO.