javascript - 如何优化数字开关创建的集合？

Question

我需要根据用户选择的下拉列表创建一定数量的对象。现在我有了这段代码。

var driversFunc = function () {

var driversCount = osagoViewModel.fields.driversCount.selectedValue();

switch (driversCount) {

    case "many":
        return [];
    case "1":
        return [new driver()];
    case "2":
        return [new driver(), new driver()];
    case "3":
        return [new driver(), new driver(), new driver()];
    case "4":
        return [new driver(), new driver(), new driver(), new driver()];
    case "5":
        return [new driver(), new driver(), new driver(), new driver(), new driver()];
    }
};

(使用knockout.js)

Answer 1

您的开关可能可以替换为:

if (driversCount === "many") {
  return [];
} else {
  var count = parseInt(driversCount, 10);
  var l = [];
  while (count--) l.push(new driver());
  return l;
}

我不明白为什么 many 映射到 []。