如何编写许多不同的条件和操作

Question

我想循环遍历对象中的1级属性,address并使用循环内的if语句测试特定于该属性的各种条件和操作.所以,我添加了2级condition和action属性,试图降低if语句的复杂性.下面的代码代表我正在尝试做的事情并且不起作用.不知道如何做到这一点.

var address = {
  first: {
    value: "Joe",
    condition: "address[key].value.length === 0",
    action: "console.log(key + ' Not street1:' + address[key].value.length)"
  },
  last: {
    value: "Dirt",
    condition: "address[key].value.length === 0",
    action: "console.log(key + ' Not street1:' + address[key].value.length)"
  },
  street1: {
    value: "123 Blah Street",
    condition: "key === 'street1' && address[key].value.length === 0",
    action: "console.log(key + ' This is street1')"
  },
};

for (var key in address) {
  var condition = address[key].condition;
  var action = address[key].action;
  if (condition) {
    return action;
  }
}

Answer 1

您将希望在这些条件和操作中使用实际的JavaScript

  first: {
    value: "Joe",
    condition: function () { return address[key].value.length === 0 },
    action: function () { console.log(key + ' Not street1:' + address[key].value.length) }
  }

eval()除非你确实需要它,否则我不建议.您的示例代码不需要它......但是谁知道这里的实际应用是什么.如果你真的需要eval,你必须小心你正在执行什么以及它是如何构建的.