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---
id: 5688e62ea601b2482ff8422b
title: 資料查找
challengeType: 1
videoUrl: 'https://scrimba.com/c/cDqW2Cg'
forumTopicId: 18259
dashedName: profile-lookup
---
# --description--
我們有一個對象數組,裏面存儲着通訊錄。
`lookUpProfile` 函數已經寫好了參數,需要 `name` 和屬性 (`prop`) 參數。
函數將會檢查通訊錄中是否存在一個 `firstName` 與傳入的 `name` 相同的聯繫人。 如果存在,那麼還需要檢查對應的聯繫人中是否存在 `prop` 屬性。
如果它們都存在,函數返回 prop 屬性對應的值。
如果 `name` 不對應於任何聯繫人,然後返回字符串 `No such contact`
如果 `prop` 屬性在匹配 `name` 的聯繫人裏不存在,返回 `No such property`
# --hints--
`lookUpProfile("Kristian", "lastName")` 應該返回字符串 `Vos`
```js
assert(lookUpProfile('Kristian', 'lastName') === 'Vos');
```
`lookUpProfile("Sherlock", "likes")` 應該返回 `["Intriguing Cases", "Violin"]`
```js
assert.deepEqual(lookUpProfile('Sherlock', 'likes'), [
'Intriguing Cases',
'Violin'
]);
```
`lookUpProfile("Harry", "likes")` 應該返回一個數組
```js
assert(typeof lookUpProfile('Harry', 'likes') === 'object');
```
`lookUpProfile("Bob", "number")` 應該返回字符串 `No such contact`
```js
assert(lookUpProfile('Bob', 'number') === 'No such contact');
```
`lookUpProfile("Bob", "potato")` 應該返回字符串 `No such contact`
```js
assert(lookUpProfile('Bob', 'potato') === 'No such contact');
```
`lookUpProfile("Akira", "address")` 應該返回字符串 `No such property`
```js
assert(lookUpProfile('Akira', 'address') === 'No such property');
```
# --seed--
## --seed-contents--
```js
// Setup
const 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--
```js
const 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) {
for (let i in contacts) {
if (contacts[i].firstName === name) {
return contacts[i][prop] || "No such property";
}
}
return "No such contact";
}
```