Question

Creates a new sequence with all the unique elements either in this sequence or among the specified arguments.

Signature

Sequence.union = function(var_args) { /*...*/ }

Sequence.union = function union(var_args) {
  return this.concat(var_args).uniq();
}

Name	Type(s)	Description
var_args	...*	The values, or array(s) of values, to be additionally included in the resulting sequence.
returns	Sequence	The new sequence.

Examples

Lazy(["foo", "bar"]).union([])             // sequence: ["foo", "bar"]
Lazy(["foo", "bar"]).union(["bar", "baz"]) // sequence: ["foo", "bar", "baz"]