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August 29, 2015 14:24
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| ruby -e "(lambda{|r| Dir::entries(r).select{|s| s.match(/(.+).cpp/)}.each{|n| File.join(root, name).tap{|path| File.write(path, open(path).read.gsub('old_name', 'new_name'))}}}).call('path_to_parent_directory')" |
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