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What is the regular expression to validate a comma delimited list like this one:
12365, 45236, 458, 1, 99996332, ...... 
645
The 0-9 indicates characters 0 through 9, the comma , indicates comma, and the semicolon indicates a ; . The closing ] indicates the end of the character set. The plus + indicates that one or more of the "previous item" must be present.
The power of regular expressions comes from its use of metacharacters, which are special characters (or sequences of characters) used to represent something else. For instance, in a regular expression the metacharacter ^ means "not". So, while "a" means "match lowercase a", "^a" means "do not match lowercase a".
I suggest you to do in the following way:
(\d+)(,\s*\d+)* which would work for a list containing 1 or more elements.
146
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