arrow-core-data / arrow.core / contains

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

Parameters

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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