Set class - typings.gojs library

NOTE: For 2.0 the #constructor argument has changed. Set now optionally accepts a collection, and only checks types in TypeScript.

An unordered iterable collection that cannot contain two instances of the same value. In TypeScript it is a generic class that enforces at compile-time the type of elements that may be added to the Set.

An example usage:

  var set = new go.Set();  // In TypeScript: new go.Set<string>();
  set.add("orange");
  set.add("apple");
  set.add("orange");
  // now set.count === 2
  // and set.contains("orange") === true
  // and set.contains("banana") === false

You can iterate over the items in a Set:

  var it = aSet.iterator;
  while (it.next()) {
    . . . it.value . . .
  }

Or:

  aSet.each(val => {
      . . . val . . .
    });

Although not precisely implementing the features of the EcmaScript 6 Set class, this GoJS Set class has synonyms for the following methods and property:

add(val): #add
delete(val): #remove
has(val): #contains
clear(): #clear
size: #count

The constructor now takes an optional Iterable or Array argument that provides the initial elements for the new Set.

Note that GoJS iteration is quite different than ES6 iteration, so that functionality has not been made somewhat compatible. These collection classes were defined in GoJS before the ES6 collection classes were proposed.

Set<T> class

Constructors

Properties

Methods

Operators

Static Methods

typings.gojs library