如何使用數組值作爲變量名？

Question

我在這裏創建了一個腳本，它創建了一個對象構造函數，然後buildList()從電子表格中獲取數據並且吐出一個包含部門名稱的數組。我在buildObjects()中試圖做的是使用該數組爲每個部門創建一個對象，然後用與部門有關的各種值填充它。很顯然，我有與線var ADCnames[i] = new ADC(ADCnames[i]);

function ADC(name) { 
    this.name = name; 
} 

function buildObjects() { 
    var ADCnames = buildList('ADC', 1); 
    var ADCarray = []; 
    for (var i in ADCnames) { 
    var ADCnames[i] = new ADC(ADCnames[i][0]); 
    ADCarray.push(<<the variable I just created>>); 
    } 
    return ADCarray; 
} 

我是新來使用對象，所以有可能是我缺少一個簡單的方法麻煩。任何幫助表示讚賞。

Answer 1

您只需重命名變量即可。

嘗試

function buildObjects() { 
    var ADCnames = buildList('ADC', 1); 
    var ADCarray = []; 
    for (var i in ADCnames) { 
    var tempADC = new ADC(ADCnames[i][0]); 
    //do whatever else you need to do to this object. 
    ADCarray.push(tempADC); 
    } 
    return ADCarray; 
} 

Answer 2

對象屬性可以通過點符號，或支架符號（如陣列）被分配

因此，嘗試這個代替：

此[名稱] =名;

您不會得到部門名稱的「變量」，但部門數組將以部門爲屬性的對象。這是你想要的，如果部門名稱永遠是唯一的，你可能不需要該廁所的數組。

更新

要在我的觀點擴大上述關於非需要額外的數組。因爲你正在處理（我假設）獨特的部門名稱，這些可能是關鍵。

所以：

function buildDepartments() { 

    var departmentList = SpreadsheetApp.getActiveSpreadsheet().getRange('a1:c2').getValues(), // Assuming a 3 column list with, say: department name, department head, department deputy. 
     departments = {}, 
     d; 

    for (d = 0; d < departmentList.length; d += 1) { 
    departments[departmentList[d][0]] = {head: departmentList[d][1], deputy: departmentList[d][2]}; 
    } 

    // To recall the department details ... however many there are 
    Logger.log(departments['Math'].head); // Logs the head of the Math department 
} 

，但是，它可能會更有意義，不打領帶自己陷入彷彿部門名稱變化，它會是一個麻煩，使變化，可能隨時間而改變的密鑰。如果您「指定」了對象，那麼使用ScriptDB也會更容易。 這樣：

function buildDepartments() { 

    // Assuming a 3 column list with, say: name, head, deputy. 
    var departmentList = SpreadsheetApp.getActiveSpreadsheet().getRange('a1:c2').getValues(), 
     departments = [], // Now this an array 
     d; 

    for (d = 0; d < departmentList.length; d += 1) { 
    departments.push({ 
     title: departmentList[d][0], 
     head: departmentList[d][1], 
     deputy: departmentList[d][2] 
    }); 
    } 

    // To recall the department details ... however many there are 
    // Logs the head of the Math department by filtering the array to a single entry 
    Logger.log(departments.filter(function (d) { return d.title = 'Math'; })[0]); 
} 

在這一點上，並把事情一點就召回部門陣列可能是一個構造函數對象再次更加直觀。因此：

function DepartmentList() { 
    var list = []; 
    this.addDepartment = function (dept) { 
    list.push({ title: dept[0], head: dept[1], deputy: dept[2] }); 
    return this; // for chaining reasons, if you like. 
    } 
    this.getDepartment() = function(dept) { 
    var foundDepartment = list.filter(function (d) { return d.title = dept; }); 
    return foundDepartment[0] || {}; // empty object if no department match 
    } 
    return list; // bare calls to the object returns the whole list 
} 

function buildDepartments() { 
var departments = SpreadsheetApp.getActiveSpreadsheet().getRange('a1:c2').getValues(), 
    departmentList = new DepartmentList(), // Now this an object again 
    d; 

    departments.forEach(departmentList.addDepartment(entry)); // Possible because GAS supports ECMAScript5 

    // To recall the department details ... however many there are 
    // Logs the head of the Math department 
    Logger.log(departmentList.getDepartment('Math').head); 
} 

後者梅託德才會開始到意義，如果輸入數據是更廣泛的或通過對象的功能需要的任何處理。對於我所說的例子來說，這可能是過度的。