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Question

在“开始”和“结束”之间，加一段代码，使得打印结果为"world, male"和"world2"

function Clazz() {}
Clazz.prototype.setAttr = function(key, value) {
  this[key] = value
}

// 开始

// 结束

var clazz1 = new Clazz()
var clazz2 = new Clazz()

clazz1.setAttr('name', 'world')
clazz1.setAttr('sex', 'male')
clazz1.name = 'hello'
clazz1.sex = 'female'

clazz2.setAttr('name', 'world2')
clazz2.name = 'world222'

console.log(clazz1.name, clazz1.sex) // world, male
console.log(clazz2.name) // world2