DoneJS StealJS jQuery++ FuncUnit DocumentJS
4.3.0
5.0.0 3.13.1 2.3.35
  • About
  • Guides
  • API Docs
  • Community
  • Contributing
  • Bitovi
    • Bitovi.com
    • Blog
    • Design
    • Development
    • Training
    • Open Source
    • About
    • Contact Us
  • About
  • Guides
  • API Docs
    • Observables
      • can-bind
      • can-compute
      • can-debug
      • can-define
      • can-define/list/list
      • can-define/map/map
      • can-define-backup
      • can-define-stream
      • can-define-stream-kefir
      • can-event-queue
      • can-kefir
      • can-list
      • can-map
      • can-map-define
      • can-observation
      • can-observation-recorder
      • can-observe
      • can-simple-map
      • can-simple-observable
      • can-stream
      • can-stream-kefir
      • can-value
    • Data Modeling
      • can-connect
      • can-connect-feathers
      • can-fixture
      • can-fixture-socket
      • can-ndjson-stream
      • can-set
        • types
          • Set
          • Compares
          • Prop
        • properties
          • Algebra
            • prototype
              • count
              • difference
              • equal
              • getSubset
              • getUnion
              • has
              • id
              • index
              • intersection
              • properSubset
              • subset
              • union
          • Translate
          • props
    • Views
      • can-component
      • can-stache
      • can-stache-bindings
      • can-stache-converters
      • can-stache-route-helpers
      • can-view-autorender
      • can-view-callbacks
      • can-view-import
      • can-view-live
      • can-view-model
      • can-view-nodelist
      • can-view-parser
      • can-view-scope
      • can-view-target
      • react-view-model
      • react-view-model/component
      • steal-stache
    • Routing
      • can-deparam
      • can-param
      • can-route
      • can-route-hash
      • can-route-mock
      • can-route-pushstate
    • JS Utilities
      • can-assign
      • can-define-lazy-value
      • can-diff
      • can-globals
      • can-join-uris
      • can-key
      • can-key-tree
      • can-make-map
      • can-parse-uri
      • can-queues
      • can-string
      • can-string-to-any
      • can-util
      • can-zone
      • can-zone-storage
    • DOM Utilities
      • can-ajax
      • can-attribute-encoder
      • can-child-nodes
      • can-control
      • can-dom-data
      • can-dom-events
      • can-dom-mutate
      • can-event-dom-enter
      • can-event-dom-radiochange
      • can-fragment
    • Data Validation
      • can-define-validate-validatejs
      • can-validate
      • can-validate-interface
      • can-validate-legacy
      • can-validate-validatejs
    • Typed Data
      • can-cid
      • can-construct
      • can-construct-super
      • can-data-types
      • can-namespace
      • can-reflect
      • can-reflect-dependencies
      • can-reflect-promise
      • can-types
    • Polyfills
      • can-symbol
      • can-vdom
    • Core
    • Infrastructure
      • can-global
      • can-test-helpers
    • Ecosystem
    • Legacy
  • Community
  • Contributing
  • GitHub
  • Twitter
  • Chat
  • Forum
  • News
Bitovi

difference

  • Edit on GitHub

algebra.difference(a, b)

Returns a set that represents the difference of sets A and B (A \ B), or returns if a difference exists.

algebra1 = new set.Algebra(set.props.boolean("completed"));
algebra2 = new set.Algebra();

// A has all of B
algebra1.difference( {} , {completed: true} ) //-> {completed: false}

// A has all of B, but we can't figure out how to create a set object
algebra2.difference( {} , {completed: true} ) //-> true

// A is totally inside B
algebra2.difference( {completed: true}, {} )  //-> false

Parameters

  1. a {Set}:

    A set.

  2. b {Set}:

    A set.

Returns

{Set|Boolean}:

If an object is returned, it is difference of sets A and B (A \ B).

If true is returned, that means that B is a subset of A, but no set object can be returned that represents that set.

If false is returned, that means there is no difference or the sets are not comparable.

CanJS is part of DoneJS. Created and maintained by the core DoneJS team and Bitovi. Currently 4.3.0.

On this page

Get help

  • Chat with us
  • File an issue
  • Ask questions
  • Read latest news