arrow-core-data / arrow.core / contains
fun <A, B> EitherOf<A, B>.contains(elem: B): Boolean
Returns true if this is a Either.Right and its value is equal to elem (as determined by ==),
returns false otherwise.
Example:
Right("something").contains("something") // Result: true
Right("something").contains("anything") // Result: false
Left("something").contains("something") // Result: false
elem - the element to test.
Return
true if the option has an element that is equal (as determined by ==) to elem, false otherwise.
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