使用for循環循環函數的問題

Question

我在for循環中遇到了一些問題。當我運行代碼時，函數似乎只運行一次，因爲顯示的是隨機列表，但不是指定的預期編號。

任何人都可以幫我嗎？

function List(max,min,numLists,numItems){ 
 
    this.max = max, 
 
    this.min = min, 
 
    this.numLists = numLists, 
 
    this.numItems = numItems, 
 
    this.generateList = function(){ 
 
     
 
     var fullArray = []; 
 
     var completeArray = []; 
 
     var numItems = this.numItems 
 
     
 
     
 
     //create an array of integers between min and max values 
 
     for (i = this.min ; i<(this.max+1) ; i++) { 
 
      fullArray.push(i); 
 
      } 
 
      
 
     //select a random value from array of integers and add to new array  
 
     for (j = 0 ; j<numItems ; j++) { 
 
      var randomItem = Math.floor(Math.random() * (fullArray.length)); 
 
      completeArray.push(fullArray[randomItem]); 
 
      } 
 
      
 
     //write new random list 
 
     document.write(completeArray); 
 
     
 
     } 
 

 
    this.generateMultipleLists = function() { 
 

 
    \t var numLists = this.numLists; 
 

 
    \t //loop list creation to create multiple list arrays 
 
    \t for (i=0 ; i<numLists ; i++){ 
 
    \t this.generateList(); 
 
    \t } 
 
    } 
 
} 
 
var newList = new List (100 , 12 , 7,15); 
 
newList.generateMultipleLists(); 
 

 

Answer 1

不要創建全局變量 在功能generateMultipleLists使用var i for循環，而不是僅僅i。