find the extension of a csv file in ruby

main.rb
file_path = "path/to/your/file.csv"
extension = File.extname(file_path) # returns ".csv"

# To remove the dot from the extension, you can use slice method
extension_without_dot = extension.slice(1..-1) # returns "csv"
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main.rb
file_path = "path/to/your/file.csv"
extension = file_path.match(/\.([^.]+)$/)[1] # returns "csv"
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