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# encoding: utf-8
class String
# Return a copy of string with ASCII characters only
# Source: http://stackoverflow.com/questions/1268289/how-to-get-rid-of-non-ascii-characters-in-ruby
#
# @return [String] a copy of string with ASCII characters only
#
# @example
# 'abc'.ascii_only #=> 'abc'
#
# @example
# '中文123'.ascii_only #=> '123'
unless String.method_defined? :ascii_only
def ascii_only
dup.ascii_only!
end
end
# Modify self and keep ASCII characters only
# Returns the string even if no changes were made.
# Source: http://stackoverflow.com/questions/1268289/how-to-get-rid-of-non-ascii-characters-in-ruby
#
# @return [String] The result string
#
# @example
# 'abc'.ascii_only! #=> 'abc'
#
# @example
# '中文123'.ascii_only! #=> '123'
unless String.method_defined? :ascii_only!
def ascii_only!
encoding_options = {
:invalid => :replace, # Replace invalid byte sequences
:undef => :replace, # Replace anything not defined in ASCII
:replace => '', # Use a blank for those replacements
:UNIVERSAL_NEWLINE_DECORATOR => true # Always break lines with \n
}
self.encode! Encoding.find('ASCII'), encoding_options
end
end
end
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