145 lines
3.1 KiB
Markdown
145 lines
3.1 KiB
Markdown
---
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id: 5688e62ea601b2482ff8422b
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title: 资料查找
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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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我们有一个对象数组，里面存储着通讯录。
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`lookUpProfile` 函数已经写好了参数，需要 `name` 和属性 (`prop`) 参数。
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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。
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如果它们都存在，函数返回 prop 属性对应的值。
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如果 `name` 不对应于任何联系人，然后返回字符串 `No such contact`。
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如果 `prop` 属性在匹配 `name` 的联系人里不存在，返回 `No such property`。
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# --hints--
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`lookUpProfile("Kristian", "lastName")` 应该返回字符串 `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")` 应该返回 `["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")` 应该返回一个数组
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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")` 应该返回字符串 `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")` 应该返回字符串 `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")` 应该返回字符串 `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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