Method: Concurrent::IVar#try_set

Defined in:

lib/concurrent/ivar.rb

#try_set(value = NULL) { ... } ⇒ Boolean

Attempt to set the ‘IVar` with the given value or block. Return a boolean indicating the success or failure of the set operation.

Parameters:

• value (Object) (defaults to: NULL) —

  the value to store in the ‘IVar`

Yields:

• A block operation to use for setting the value

Returns:

• (Boolean) —

  true if the value was set else false

Raises:

• (ArgumentError) —

  if both a value and a block are given

• (Concurrent::MultipleAssignmentError) —

  if the ‘IVar` has already been set or otherwise completed

# File 'lib/concurrent/ivar.rb', line 144

def try_set(value = NULL, &block)
  set(value, &block)
  true
rescue MultipleAssignmentError
  false
end