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Using Regular Expressions to validate a numerical string. (See related posts)

Using Ruby and Regular Expressions, this code validates a string for numbers only. If the string variable contains only numbers then 0 will be returned otherwise nil.

a = '134323'
/^[0-9]*$/ =~ a
#result returns 0, indicating success
to ruby regular expressions validation numeric by jrobertson on Tue Oct 09 07:45:13 -0400 2007

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