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tag: v3.0.4
37 lines (35 sloc) 1.059 kb
class Object
# Invokes the method identified by the symbol +method+, passing it any arguments
# and/or the block specified, just like the regular Ruby <tt>Object#send</tt> does.
#
# *Unlike* that method however, a +NoMethodError+ exception will *not* be raised
# and +nil+ will be returned instead, if the receiving object is a +nil+ object or NilClass.
#
# ==== Examples
#
# Without try
# @person && @person.name
# or
# @person ? @person.name : nil
#
# With try
# @person.try(:name)
#
# +try+ also accepts arguments and/or a block, for the method it is trying
# Person.try(:find, 1)
# @people.try(:collect) {|p| p.name}
#--
# This method definition below is for rdoc purposes only. The alias_method call
# below overrides it as an optimization since +try+ behaves like +Object#send+,
# unless called on +NilClass+.
def try(method, *args, &block)
send(method, *args, &block)
end
remove_method :try
alias_method :try, :__send__
end
class NilClass #:nodoc:
def try(*args)
nil
end
end
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