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Contents
class Object
# mainly from active_support on http://github.com/rails/rails/
# Returns +value+ after yielding +value+ to the block. This simplifies the
# process of constructing an object, performing work on the object, and then
# returning the object from a method. It is a Ruby-ized realization of the K
# combinator, courtesy of Mikael Brockman.
#
# ==== Examples
#
# # Without returning
# def foo
# values = []
# values << "bar"
# values << "baz"
# return values
# end
#
# foo # => ['bar', 'baz']
#
# # returning with a local variable
# def foo
# returning values = [] do
# values << 'bar'
# values << 'baz'
# end
# end
#
# foo # => ['bar', 'baz']
#
# # returning with a block argument
# def foo
# returning [] do |values|
# values << 'bar'
# values << 'baz'
# end
# end
#
# foo # => ['bar', 'baz']
def returning(value)
yield(value)
value
end
# Tries to send the method only if object responds to it. Return +nil+ otherwise.
#
# ==== Example :
#
# # Without try
# @person ? @person.name : nil
#
# With try
# @person.try(:name)
def try(method, *args, &block)
send(method, *args, &block) if respond_to?(method, true)
end
end
Version data entries
5 entries across 5 versions & 1 rubygems