为啥没有结果跳出 哪块代码错误了

[gufengbangye]

Challenge Profile Lookup%7B%20%0A%20%20%20%20%20%20return%20contancts%5Bi%5D.prop%3B%0A%20%20%20%20%7D%0A%20%20%20%20%20%20else%20if(firstName!%3Dcontacts%5Bi%5D.firstName)%7B%0A%20%20%20%20%20%20%20%20return%20%22No%20such%20contact%22%3B%0A%20%20%20%20%20%20%7D%0A%20%20%20%20else%20if(!contacts%5Bi%5D.hasOwnProperty(prop)%26%26firstName%3D%3Dcontacts%5Bi%5D.firstName)%7B%0A%20%20%20%20%20%20return%20%22No%20such%20property%22%3B%0A%20%20%20%20%7D%0A%20%20%7D%0A%7D%0A%2F%2F%20%E8%AF%B7%E6%8A%8A%E4%BD%A0%E7%9A%84%E4%BB%A3%E7%A0%81%E5%86%99%E5%9C%A8%E8%BF%99%E6%9D%A1%E6%B3%A8%E9%87%8A%E4%BB%A5%E4%B8%8A%0A%0A%0A%2F%2F%20%E4%BD%A0%E5%8F%AF%E4%BB%A5%E4%BF%AE%E6%94%B9%E8%BF%99%E4%B8%80%E8%A1%8C%E6%9D%A5%E6%B5%8B%E8%AF%95%E4%BD%A0%E7%9A%84%E4%BB%A3%E7%A0%81%0AlookUp(%22Akira%22%2C%20%22likes%22)%3B%0A) has an issue. User Agent is: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36. Please describe how to reproduce this issue, and include links to screenshots if possible.

My code:

//初始化变量
var contacts = [
    {
        "firstName": "Akira",
        "lastName": "Laine",
        "number": "0543236543",
        "likes": ["Pizza", "Coding", "Brownie Points"]
    },
    {
        "firstName": "Harry",
        "lastName": "Potter",
        "number": "0994372684",
        "likes": ["Hogwarts", "Magic", "Hagrid"]
    },
    {
        "firstName": "Sherlock",
        "lastName": "Holmes",
        "number": "0487345643",
        "likes": ["Intriguing Cases", "Violin"]
    },
    {
        "firstName": "Kristian",
        "lastName": "Vos",
        "number": "unknown",
        "likes": ["Javascript", "Gaming", "Foxes"]
    }
];

function lookUp(firstName, prop){
// 请把你的代码写在这条注释以下
  for(var i=0;i<contacts.legnth;i++){
    if(firstName == contacts[i].firstName&&contacts[i].hasOwnProperty(prop)){ 
      return contancts[i].prop;
    }
      else if(firstName!=contacts[i].firstName){
        return "No such contact";
      }
    else if(!contacts[i].hasOwnProperty(prop)&&firstName==contacts[i].firstName){
      return "No such property";
    }
  }
}
// 请把你的代码写在这条注释以上

// 你可以修改这一行来测试你的代码
lookUp("Akira", "likes");

[wenzhaoda]

// 请把你的代码写在这条注释以下 var result=""; for(var i=0;i<contacts.length;i++){ var lu=contacts[i].hasOwnProperty(prop); var ln=contacts[i].firstName; if(contacts[i].firstName==firstName&&lu===true){ return contacts[i][prop]; } else if(lu===false){ result="No such property"; } else if(ln!=firstName){ result="No such contact"; } } // 请把你的代码写在这条注释以上 return result; }