Javascript 函数接受数组和字符串作为参数

Question

我有这个代码:

    var showRegion = function(key) {
        if (key in regionOptions) {
            var entry       = regionOptions[key];
            var builder     = entry.builder;
            var layoutObj   = entry.layoutObj;
            var viewStarter = entry.viewStarter;

            var view = new builder();
            logger.info('Controller.' + key + ' => CreateAccountLayoutController');
            Controller.layout[layoutObj].show(view);
            view[viewStarter]();
        }
    };

我需要的是参数应该能够接受数组或字符串，并且应该以任何一种方式工作。

示例函数调用:

showRegion('phoneNumberRegion');
showRegion(['phoneNumberRegion', 'keyboardRegion', 'nextRegion']);

Answer 1

这篇文章很旧，但这里有一个很好的提示:

function showRegions(keys) {
  keys = [].concat(keys)
  return keys
}

// short way
const showRegions = key => [].concat(keys)

showRegions(1) // [1]
showRegions([1, 2, 3]) // [1, 2, 3]