I need to find an exact match of the number 4 in a comma-separated string.
4,44,24 - expected 4,
44,4,24 - expected 4,
4 - expected 4
The goal is to identify 4 without being confused by similar numbers like 44 and 24.
I attempted to use /\b4,/g with word boundaries.
4,44,24 - Matches
44,4,24 - Matches
4 - fails
If you have any suggestions, please let me know. Thank you!
If you want to ensure that the number 4 is surrounded by non-alphanumeric characters, you can use the pattern \b4\b. For a more specific case, like in your example where you don't expect the string - expected 4, you can try:
(?<=^|,)4(?=$|,)
This regex pattern asserts that the number 4 must be preceded by either the start of a line (^) or a comma (,), and followed by either the end of a line ($) or a comma (,). You can test this pattern at https://regex101.com/r/rPUIvt/latest.
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