在 Scala Stack class
,則使用exists()方法檢查謂詞是否對堆棧的任何元素成立。
函數定義: def exists(p: (A) => Boolean): Boolean
返回類型: It returns true if the predicate holds true for any of the elements of the stack or else returns false.
範例1:
// Scala program of exists()
// method
// Import Stack
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating stack
val s1 = Stack(1, 3, 2, 7, 6, 5)
// Print the stack
println(s1)
// Applying exists method
val result = s1.exists(x => {x % 7 == 0})
// Display output
println("Element divisible by 7 exists: " + result)
}
}
輸出:
Stack(1, 3, 2, 7, 6, 5) Element divisible by 7 exists: true
範例2:
// Scala program of exists()
// method
// Import Stack
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating stack
val s1 = Stack(1, 3, 2, 7, 6, 5)
// Print the stack
println(s1)
// Applying exists method
val result = s1.exists(x => {x == 10})
// Display output
println("Element 10 exists: " + result)
}
}
輸出:
Stack(1, 3, 2, 7, 6, 5) Element 10 exists: false
相關用法
- Scala Set exists()用法及代碼示例
- Scala Map exists()用法及代碼示例
- Scala Queue exists()用法及代碼示例
- Scala Iterator exists()用法及代碼示例
- Scala SortedSet exists()用法及代碼示例
- Scala List exists()用法及代碼示例
- Scala TreeSet exists()用法及代碼示例
- Scala SortedMap exists()用法及代碼示例
- Scala ListSet exists()用法及代碼示例
- Scala Stack contains()用法及代碼示例
- Scala Stack ++:()用法及代碼示例
- Scala Stack max()用法及代碼示例
- Scala Stack :()用法及代碼示例
- Scala Stack :+()用法及代碼示例
注:本文由純淨天空篩選整理自rupesh_rao大神的英文原創作品 Scala Stack exists() method with example。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。