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Contents
class File
# Takes a file name string and returns or changes its extension.
#
# Without a new extension argument, returns the extension of the
# file name. In this respect #ext is like #extname, but unlike
# #extname it does not include the dot prefix.
#
# With a new extension argument, changes the exension of the file
# name to the new extension and returns it.
#
# Examples
#
# File.ext('file.rb') # => 'rb'
# File.ext('file.rb', 'txt') # => 'file.txt'
# File.ext('file.rb', '.txt') # => 'file.txt'
# File.ext('file.rb', '') # => 'file'
#
# This method can be used with String#file for more object-oriented notation:
#
# 'file.rb'.file.ext('txt') # => 'file.txt'
#
# CREDIT: Lavir the Whiolet
def self.ext(filename, new_ext=nil)
old_ext = extname(filename)
if new_ext == nil
old_ext.sub(/^\./, '')
else
new_ext = '.' + new_ext unless (new_ext.empty? || new_ext[0,1] == '.')
filename.chomp(old_ext) + new_ext
end
end
end
Version data entries
10 entries across 9 versions & 2 rubygems