javascript - 自调用JS函数

Question

我有以下代码:

        var currentKey = 0;
        var totalBinaryMultiplesCollection = {};
        for (var row in playField) {
            if (playField.hasOwnProperty(row)) {
                alert(row + " -> " + playField[row]);
                var rowLength = playField[row].length;
                //Call rowCalc function which returns an array with the binary nrs used in calc
                var binaryMultiplesRow = rowCalc(rowLength);
                for(j=0; j < binaryMultiplesRow.length; j++){
                    //Two methods
                    totalBinaryMultiplesCollection[currentKey] = binaryMultiplesRow[j];
                    currentKey+=1;
                }
            }   
        }

我想将这段代码更改为自调用函数。所以我添加了以下内容:

(function (){ 位于代码块之前。
})(); 在代码块后面。

然而，这给了我以下错误:

Uncaught TypeError: (intermediate value)(intermediate值)(中间值)(...)不是函数(...)。

我似乎找不到这里的问题。有人可以告诉我发生了什么事吗？

当前版本:

(function () {
        var currentKey = 0;
        var totalBinaryMultiplesCollection = {};
        for (var row in playField) {
            if (playField.hasOwnProperty(row)) {
                alert(row + " -> " + playField[row]);
                var rowLength = playField[row].length;
                //Call rowCalc function which returns an array with the binary nrs used in calc
                var binaryMultiplesRow = rowCalc(rowLength);
                for(j=0; j < binaryMultiplesRow.length; j++){
                    //Two methods
                    totalBinaryMultiplesCollection[currentKey] = binaryMultiplesRow[j];
                    currentKey+=1;
                }
            }   
        }
    })();

以及被调用的 rowCalc 函数:

var rowCalc = function(rowlength){
        var currentRowCollection = [];
        switch(rowlength) {
        case 1:
            currentRowCollection.push(1);
            break;
        case 2:
            currentRowCollection.push(2);
            break;
        case 3:
            currentRowCollection.push(1);
            currentRowCollection.push(2);
            break;
        case 4:
            currentRowCollection.push(4);
            break;
        case 5:
            currentRowCollection.push(1);
            currentRowCollection.push(4);
            break;
        case 6:
            currentRowCollection.push(2);
            currentRowCollection.push(4);
        case 7:
            currentRowCollection.push(2);
            currentRowCollection.push(4);
            currentRowCollection.push(1);
            break;
        default:
            alert("You made a mistake!")
        }
        return currentRowCollection; 
    }

Answer 1

您的 rowCalc 函数中缺少两个分号，其中第二个分号导致了错误:

var rowCalc = function(rowlength){
    var currentRowCollection = [];
    switch(rowlength) {
    case 1:
        currentRowCollection.push(1);
        break;
    case 2:
        currentRowCollection.push(2);
        break;
    case 3:
        currentRowCollection.push(1);
        currentRowCollection.push(2);
        break;
    case 4:
        currentRowCollection.push(4);
        break;
    case 5:
        currentRowCollection.push(1);
        currentRowCollection.push(4);
        break;
    case 6:
        currentRowCollection.push(2);
        currentRowCollection.push(4);
    case 7:
        currentRowCollection.push(2);
        currentRowCollection.push(4);
        currentRowCollection.push(1);
        break;
    default:
        alert("You made a mistake!");
//                                  ^
    }
    return currentRowCollection; 
}; /*
 ^  */