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Contents
#--
# = Developer's Notes
#
# Old definition of start_with? written by Lucas Carlson
# and Blaine Cook was ...
#
# index(prefix) == 0
#
# I like the simplicity of this definition, but I could not
# find a way define #end_with? in similar terms and still
# accept regular expressions for the suffix. So I had to use
# Regexp match. On th upside, we can get MatchData
# which might be more useful.
#++
class String
#unless method_defined?(:start_with?) # 1.8.7+
# Does a string start with the given prefix?
#
# "hello".start_with?("he") #=> true
# "hello".start_with?("to") #=> false
#
# Note: This definition is better than standard Ruby's
# becuase it handles regular expressions.
#
# CREDIT: Juris Galang
def start_with?(prefix)
prefix = Regexp.escape(prefix.to_s) unless Regexp===prefix
/^#{prefix}/.match(self) ? true : false
end
#end
#unless method_defined?(:end_with?) # 1.8.7+
# Does a string end with the given suffix?
#
# "hello".end_with?("lo") #=> true
# "hello".end_with?("to") #=> false
#
# Note: This definition is better than standard Ruby's
# becuase it handles regular expressions.
#
# CREDIT: Juris Galang
def end_with?(suffix)
suffix = Regexp.escape(suffix.to_s) unless Regexp===suffix
/#{suffix}$/.match(self) ? true : false
end
#end
alias_method :starts_with?, :start_with?
alias_method :ends_with? , :end_with?
end
Version data entries
7 entries across 6 versions & 1 rubygems