3.5 KiB
3.5 KiB
id | title | challengeType | videoUrl | forumTopicId | dashedName |
---|---|---|---|---|---|
5688e62ea601b2482ff8422b | 资料查找 | 1 | https://scrimba.com/c/cDqW2Cg | 18259 | profile-lookup |
--description--
我们有一个对象数组,里面存储着通讯录。
lookUpProfile
函数已经写好了参数,需要 name
和属性 (prop
) 参数。
函数将会检查通讯录中是否存在一个 firstName
与传入的 name
相同的联系人。 如果存在,那么还需要检查对应的联系人中是否存在 prop
属性。
如果它们都存在,函数返回 prop 属性对应的值。
如果 name
不对应于任何联系人,然后返回字符串 No such contact
。
如果 prop
属性在匹配 name
的联系人里不存在,返回 No such property
。
--hints--
lookUpProfile("Kristian", "lastName")
应该返回字符串 Vos
assert(lookUpProfile('Kristian', 'lastName') === 'Vos');
lookUpProfile("Sherlock", "likes")
应该返回 ["Intriguing Cases", "Violin"]
assert.deepEqual(lookUpProfile('Sherlock', 'likes'), [
'Intriguing Cases',
'Violin'
]);
lookUpProfile("Harry", "likes")
应该返回一个数组
assert(typeof lookUpProfile('Harry', 'likes') === 'object');
lookUpProfile("Bob", "number")
应该返回字符串 No such contact
assert(lookUpProfile('Bob', 'number') === 'No such contact');
lookUpProfile("Bob", "potato")
应该返回字符串 No such contact
assert(lookUpProfile('Bob', 'potato') === 'No such contact');
lookUpProfile("Akira", "address")
应该返回字符串 No such property
assert(lookUpProfile('Akira', 'address') === 'No such property');
--seed--
--seed-contents--
// Setup
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 lookUpProfile(name, prop){
// Only change code below this line
// Only change code above this line
}
lookUpProfile("Akira", "likes");
--solutions--
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"]
},
];
//Write your function in between these comments
function lookUpProfile(name, prop){
for(var i in contacts){
if(contacts[i].firstName === name) {
return contacts[i][prop] || "No such property";
}
}
return "No such contact";
}
//Write your function in between these comments
lookUpProfile("Akira", "likes");