Singleton Pattern - Common Uses

Common Uses

  • The Abstract Factory, Builder, and Prototype patterns can use Singletons in their implementation.
  • Facade Objects are often Singletons because only one Facade object is required.
  • State objects are often Singletons.
  • Singletons are often preferred to global variables because:
    • They do not pollute the global name space (or, in languages with namespaces, their containing namespace) with unnecessary variables.
    • They permit lazy allocation and initialization, whereas global variables in many languages will always consume resources.

Read more about this topic:  Singleton Pattern

Famous quotes containing the word common:

    “In all conversation between two persons, tacit reference is made, as to a third party, to a common nature. That third party or common nature is not social; it is impersonal; is God.”
    —Ralph Waldo Emerson (1803–1882)

    “In common with other rural regions much of the Iowa farm lore concerns the coming of company. When the rooster crows in the doorway, or the cat licks his fur, company is on the way.”
    —For the State of Iowa, U.S. public relief program (1935-1943)