I am currently working on creating a regular expression to ensure there are no double spaces in a string, while also requiring a single space before the characters MO or GO, with no spaces allowed at the start or end of the string.
Example 1: It is 40 GO is correct
Example 2: It is 40GO is incorrect
Example 3: It is 40 GO is incorrect
So far, I have this regular expression: ^[^ ][a-zA-Z0-9 ,()]*[^;'][^ ]$, which successfully prevents spaces at the beginning and end of the string, as well as the ";" character. It's working well.
However, my challenge lies in disallowing double spaces anywhere in the string, and ensuring a space before instances of MO or GO.
After extensive research, I have tried these modifications:
To prevent double spaces:
^[^ ][a-zA-Z0-9 ,()]*((?!.* {2}).+)[^;'][^ ]$To require a space before MO:
^[^ ][a-zA-Z0-9 ,()]*(?=\sMO)*[^;'][^ ]$Unfortunately, neither of these changes seem to be working correctly. Any assistance in solving this issue would be greatly appreciated.