Fix regex to properly validate non-negative integer strings #3
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Updated the regex in the validation logic to ensure the entire string consists solely of digits, preventing invalid inputs with mixed characters.
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This pull request fixes the validation logic in the function that checks whether a given value is a positive integer (or a string representing a positive integer). The previous regex pattern '/[0-9]+/' only checked for the presence of one or more numeric characters but allowed invalid inputs like "abc123" or "123abc".
The updated regex '/^[0-9]+$/' ensures that the entire string consists solely of digits, representing a valid non-negative integer. This guarantees the proper validation of inputs.