摘要：
一、对象遍历 // 循环一组对象 for in let obj = { name:'caixia', age:11, happy:'happy...' } for(let key in obj){ console.log(`每项的key为 ${key },key值为 ${obj[key ]}`) } 阅读全文
摘要：
// 计算一组数组中key值相同的数量 let arr = [ { name: 'Mokeke', age: 10, }, { name: 'caixia', age: 10, }, { name: 'caixia', age: 10, }, { name: 'zijian', age: 11, } 阅读全文