Class: Object

Inherits:
BasicObject
Defined in:
lib/reactive_extensions/object/try_rescue.rb

Overview

Ruby’s core Array class. See documentation for version 2.1.5, 2.0.0, or 1.9.3.

Instance Method Summary collapse

Instance Method Details

#try_rescue(*args, &block) ⇒ Object

The #try_rescue method extends ReactiveSupport’s #try method so it rescues NoMethodErrors and TypeErrors as well as returning nil when called on a nil value.

Like the #try method, #try_rescue takes 1 or more arguments. The first argument is the method to be called on the calling object, passed as a symbol. The others are zero or more arguments that will be passed through to that method, and &block is an optional block that will be similarly passed through.

Example of usage identical to #try:

nil.try(:map) {|a| a.to_s }           # => nil
nil.try_rescue(:map) {|a| a.to_s }    # => nil

Example of usage calling a method that is not defined on the calling object:

10.try(:to_h)           # => TypeError
10.try_rescue(:to_h)    # => nil

Example of usage with invalid arguments:

%w(foo, bar, baz).try(:join, [:hello, :world])        # => TypeError
%w(foo, bar, baz).try_rescue(:join, [:hello, :world]) # => nil



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# File 'lib/reactive_extensions/object/try_rescue.rb', line 35

def try_rescue(*args, &block)
  self.try(*args, &block) rescue nil
end