將循環結果添加到數組並在最後一個循環後顯示添加元素的總和

Question

我必須獲取最近幾周基於每週的一些記錄，並且必須將一週記錄中的值添加到數組中。所以，我宣佈6陣列存儲6周的記錄。我的代碼是：

var w_0 = [];var w_1 = [];var w_2 = [];var w_3 = [];var w_4 = [];var w_5 = []; 
var myTotal = 0; 
var arr_name = ""; 

for(var j=0;j<=5;j++) 
{ 

    var start_date=""; 
    var end_date=""; 

    //code to fetch the records added between start_date,end_date 
    //there may be more that one record 

    var count = getRecordCount(); //My function 
    //following loop is to fetch value from a record 
    for(var i=0;i<count;i++)  
    { 
     var val1 = getRecordByIndex(i).getValue("rem_val"); //getRecordByIndex() and getValue() are our pre-defined functions. 

     //here I want to push the values into the array w_0 

     arr_name = "w_"+j; 
     [arr_name].push(val1); //this is not working 
     alert([arr_name]); //showing 'w_0' 

    } 

    //and here I want to sum all the array elements when i reaches its maximum 
    for(var a=0;a<[arr_name].length; a++){ 
     myTotal += parseInt([arr_name][a]); 
    } 
    alert("Total value of week"+j+"="+parseInt(myTotal)); 
} 

如何將內循環的值添加到基於外循環的數組？

Answer 1

你發現自己創建具有順序編號名稱變量任何時候，你也許應該使用數組來代替。

var w = [[], [], [], [], []]; 

然後，無論你試圖用[arr_name]指特定w_j變量，你應該使用w[j]。

for(var j=0;j<=w.length;j++) 
{ 

    var cur_w = w[j]; 
    var start_date=""; 
    var end_date=""; 

    //code to fetch the records added between start_date,end_date 
    //there may be more that one record 

    var count = getRecordCount(); //My function 
    //following loop is to fetch value from a record 
    for(var i=0;i<count;i++)  
    { 
     var val1 = getRecordByIndex(i).getValue("rem_val"); //getRecordByIndex() and getValue() are our pre-defined functions. 

     cur_w.push(val1); 
     alert(cur_w); 

    } 

    //and here I want to sum all the array elements when i reaches its maximum 
    for(var a=0;a<cur_w.length; a++){ 
     myTotal += parseInt(cur_w[a]); 
    } 
    alert("Total value of week"+j+"="+parseInt(myTotal)); 
} 

Answer 2

如果要動態操控全局變量，你可以使用窗口前綴：

arr_name = "w_"+j; 
window[arr_name].push(val1); // This should work