/ Ruby
/
method

extname

v2_6_3 - Show latest stable - Class: File
extname(p1)
public

Returns the extension (the portion of file name in path starting from the last period).

If path is a dotfile, or starts with a period, then the starting dot is not dealt with the start of the extension.

An empty string will also be returned when the period is the last character in path.

File.extname("test.rb")         #=> ".rb"
File.extname("a/b/d/test.rb")   #=> ".rb"
File.extname(".a/b/d/test.rb")  #=> ".rb"
File.extname("foo.")            #=> ""
File.extname("test")            #=> ""
File.extname(".profile")        #=> ""
File.extname(".profile.sh")     #=> ".sh"

1Note

File name without the extension

metavida ยท Jan 27, 20101 thank

To get the file name without the extension you can use File.extname in combination with File.basename

File.basename("test.rb", File.extname("test.rb"))             #=> "test"
File.basename("a/b/d/test.rb", File.extname("a/b/d/test.rb")) #=> "test"
File.basename("test", File.extname("test"))                   #=> "test"
File.basename(".profile", File.extname(".profile"))           #=> ".profile"