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→{{header|Ruby}}: use lang tag
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=={{header|Ruby}}==
Pattern matching using regular expressions
<lang ruby> #define a recursive function that will traverse the directory tree
def printAndDescend(pattern)
#we keep track of the directories, to be used in the second, recursive part of this function
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end
#print all ruby files
printAndDescend(/.+\.rb$/)</lang>
Or use the Find core Module
<lang ruby> require 'find'
def find_and_print(path, pattern)
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# print all the ruby files
find_and_print(".", /.+\.rb$/)</lang>
Or, to find and print all files under '/foo/bar' the easy way:
<lang ruby> Dir.glob( File.join('/foo/bar', '**', '*') ) { |file| puts file }</lang>
=={{header|Scala}}==
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