145 lines
3.1 KiB
Markdown
145 lines
3.1 KiB
Markdown
---
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id: 5688e62ea601b2482ff8422b
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title: 資料查找
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cDqW2Cg'
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forumTopicId: 18259
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dashedName: profile-lookup
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---
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# --description--
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我們有一個對象數組,裏面存儲着通訊錄。
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`lookUpProfile` 函數已經寫好了參數,需要 `name` 和屬性 (`prop`) 參數。
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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。
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如果它們都存在,函數返回 prop 屬性對應的值。
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如果 `name` 不對應於任何聯繫人,然後返回字符串 `No such contact`。
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如果 `prop` 屬性在匹配 `name` 的聯繫人裏不存在,返回 `No such property`。
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# --hints--
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`lookUpProfile("Kristian", "lastName")` 應該返回字符串 `Vos`
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```js
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assert(lookUpProfile('Kristian', 'lastName') === 'Vos');
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```
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`lookUpProfile("Sherlock", "likes")` 應該返回 `["Intriguing Cases", "Violin"]`
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```js
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assert.deepEqual(lookUpProfile('Sherlock', 'likes'), [
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'Intriguing Cases',
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'Violin'
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]);
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```
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`lookUpProfile("Harry", "likes")` 應該返回一個數組
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```js
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assert(typeof lookUpProfile('Harry', 'likes') === 'object');
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```
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`lookUpProfile("Bob", "number")` 應該返回字符串 `No such contact`
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```js
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assert(lookUpProfile('Bob', 'number') === 'No such contact');
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```
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`lookUpProfile("Bob", "potato")` 應該返回字符串 `No such contact`
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```js
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assert(lookUpProfile('Bob', 'potato') === 'No such contact');
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```
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`lookUpProfile("Akira", "address")` 應該返回字符串 `No such property`
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```js
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assert(lookUpProfile('Akira', 'address') === 'No such property');
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```
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# --seed--
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## --seed-contents--
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```js
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// Setup
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const contacts = [
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{
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firstName: "Akira",
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lastName: "Laine",
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number: "0543236543",
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likes: ["Pizza", "Coding", "Brownie Points"],
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},
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{
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firstName: "Harry",
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lastName: "Potter",
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number: "0994372684",
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likes: ["Hogwarts", "Magic", "Hagrid"],
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},
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{
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firstName: "Sherlock",
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lastName: "Holmes",
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number: "0487345643",
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likes: ["Intriguing Cases", "Violin"],
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},
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{
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firstName: "Kristian",
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lastName: "Vos",
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number: "unknown",
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likes: ["JavaScript", "Gaming", "Foxes"],
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},
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];
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function lookUpProfile(name, prop) {
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// Only change code below this line
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// Only change code above this line
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}
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lookUpProfile("Akira", "likes");
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```
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# --solutions--
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```js
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const contacts = [
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{
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firstName: "Akira",
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lastName: "Laine",
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number: "0543236543",
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likes: ["Pizza", "Coding", "Brownie Points"],
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},
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{
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firstName: "Harry",
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lastName: "Potter",
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number: "0994372684",
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likes: ["Hogwarts", "Magic", "Hagrid"],
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},
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{
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firstName: "Sherlock",
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lastName: "Holmes",
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number: "0487345643",
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likes: ["Intriguing Cases", "Violin"],
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},
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{
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firstName: "Kristian",
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lastName: "Vos",
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number: "unknown",
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likes: ["JavaScript", "Gaming", "Foxes"],
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},
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];
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function lookUpProfile(name, prop) {
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for (let i in contacts) {
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if (contacts[i].firstName === name) {
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return contacts[i][prop] || "No such property";
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}
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}
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return "No such contact";
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}
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```
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