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Scala List exists()用法及代碼示例


exists()方法用於檢查給定謂詞是否滿足列表中的元素。

函數定義: def exists(p: (A) => Boolean): Boolean

返回類型: It returns true if the stated predicate holds true for some elements of the list else it returns false.



範例1:

// Scala program of exists() 
// method 
  
// Creating object 
object GfG 
{  
  
    // Main method 
    def main(args:Array[String]) 
    { 
        // Creating a list 
        val m1 = List(1, 2, 3, 4, 5) 
          
        // Applying exists method 
        val result = m1.exists(y => {y % 3 == 0}) 
          
        // Displays output 
        println(result) 
          
    } 
} 
輸出:
true

範例2:

// Scala program of exists() 
// method 
  
// Creating object 
object GfG 
{  
  
    // Main method 
    def main(args:Array[String]) 
    { 
        // Creating a list 
        val m1 = List(1, 2, 3, 4, 5) 
          
        // Applying exists method 
        val result = m1.exists(y => {y % 9 == 0}) 
          
        // Displays output 
        println(result) 
      
    } 
} 
輸出:
false


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注:本文由純淨天空篩選整理自nidhi1352singh大神的英文原創作品 Scala List 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。