Batman.js is no longer in production at Shopify and is not actively maintained.

This website is left for reference (and for old times' sake).


Batman.SetUnion extends Batman.BinarySetOperation. It implements a union operation: the SetUnion contains members found in either set passed to the constructor, without duplicates.

Since Batman.SetUnion is a subclass of Batman.Set, you can use it just like a Batman.Set.

test 'SetUnion contains the union of two sets', ->
  left = new Batman.Set(1, 2, 3)
  right = new Batman.Set(3, 4, 5)
  operation = new Batman.SetUnion(left, right)
  ok operation.has(1), 'has items from the left set'
  ok operation.has(4), 'has items from the right set'
  ok operation.has(3), 'has items from both sets'

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