Instance Method インスタンスメソッド

contains(_:)

Returns a Boolean value that indicates whether the given element exists in the set.

Declaration 宣言 

func contains(_ member: AccessibilityTraits) -> Bool

Return Value 戻り値

true if member exists in the set; otherwise, false.

Parameters パラメータ

member

An element to look for in the set.

Discussion 議論

This example uses the contains(_:) method to test whether an integer is a member of a set of prime numbers.


let primes: Set = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37]
let x = 5
if primes.contains(x) {
    print("\(x) is prime!")
} else {
    print("\(x). Not prime.")
}
// Prints "5 is prime!"