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class String
unless '1.8.7 and up'.respond_to?(:start_with?)
# Does the string start with the specified +prefix+?
def start_with?(prefix)
prefix = prefix.to_s
self[0, prefix.length] == prefix
end
# Does the string end with the specified +suffix+?
def end_with?(suffix)
suffix = suffix.to_s
self[-suffix.length, suffix.length] == suffix
end
end
alias_method :starts_with?, :start_with?
alias_method :ends_with?, :end_with?
end
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