re = /^CDPHP_SPRPT_GapList_[0-9]{6}(2[0-1]|1[01][0-9]|1[6-9])_[0-9]{9}.txt/m
str = 'NY_Community_CLM_DIAG_08282019.txt
NY_Community_CLM_DIAG_07152019.txt
CDPHP_SPRPT_GapList_20191028_619675879.txt
CDPHP_SPRPT_GapList_20191021_617641986.txt
CDPHP_SPRPT_GapList_20191017_616743586.txt
CDPHP_SPRPT_GapList_20191040_619675879.txt
CDPHP_SPRPT_GapList_20191018_616743586.txt
CDPHP_SPRPT_GapList_20191019_616743586.txt
CDPHP_SPRPT_GapList_20191020_616743586.txt
CDPHP_SPRPT_GapList_20191016_616743586.txt
CDPHP_SPRPT_GapList_20191015_616743586.txt
CDPHP_SPRPT_GapList_20191009_616743586.txt
CDPHP_SPRPT_GapList_20200816_616743586.txt'
# Print the match result
str.scan(re) do |match|
puts match.to_s
end
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html