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class Array
def select! # :yield: x
i = 0
each_with_index { |x, j|
yield x or next
self[i] = x if i != j
i += 1
}
return nil if i == size
self[i..-1] = []
self
end unless method_defined?(:select!)
def sort_by!(&block) # :yield: x
replace(sort_by(&block))
end unless method_defined?(:sort_by!)
end
class Hash
class << self
def try_convert(object)
if object.is_a?(Hash) ||
(object.respond_to?(:to_hash) && (object = object.to_hash).is_a?(Hash))
object
else
nil
end
end unless method_defined?(:try_convert)
end
end
class String
class << self
def try_convert(object)
if object.is_a?(String) ||
(object.respond_to?(:to_str) && (object = object.to_str).is_a?(String))
object
else
nil
end
end unless method_defined?(:try_convert)
end
end
# In Ruby < 1.9.3 URI() does not accept a URI object.
if RUBY_VERSION < "1.9.3"
require 'uri'
begin
URI(URI(''))
rescue
def URI(url) # :nodoc:
case url
when URI
url
when String
URI.parse(url)
else
raise ArgumentError, 'bad argument (expected URI object or URI string)'
end
end
end
end
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