145 lines
3.8 KiB
Markdown
145 lines
3.8 KiB
Markdown
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---
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id: 5688e62ea601b2482ff8422b
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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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localeTitle: 资料查找
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---
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## Description
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<section id='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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函数<code>lookUp</code>有两个预定义参数:<code>firstName</code>值和<code>prop</code>属性 。
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函数将会检查通讯录中是否存在一个与传入的<code>firstName</code>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<code>prop</code>属性。
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如果它们都存在,函数返回<code>prop</code>属性对应的值。
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如果<code>firstName</code>值不存在,返回<code>"No such contact"</code>。
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如果<code>prop</code>属性不存在,返回<code>"No such property"</code>。
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>"Kristian", "lastName"</code>应该返回 <code>"Vos"</code>。
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testString: assert(lookUpProfile('Kristian','lastName') === "Vos");
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- text: <code>"Sherlock", "likes"</code>应该返回 <code>["Intriguing Cases", "Violin"]</code>。
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testString: assert.deepEqual(lookUpProfile("Sherlock", "likes"), ["Intriguing Cases", "Violin"]);
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- text: <code>"Harry","likes"</code>应该返回 an array。
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testString: assert(typeof lookUpProfile("Harry", "likes") === "object");
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- text: <code>"Bob", "number"</code>应该返回 "No such contact"。
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testString: assert(lookUpProfile("Bob", "number") === "No such contact");
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- text: <code>"Bob", "potato"</code>应该返回 "No such contact"。
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testString: assert(lookUpProfile("Bob", "potato") === "No such contact");
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- text: <code>"Akira", "address"</code>应该返回 "No such property"。
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testString: assert(lookUpProfile("Akira", "address") === "No such property");
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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//Setup
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var 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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// Change these values to test your function
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lookUpProfile("Akira", "likes");
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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var 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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//Write your function in between these comments
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function lookUpProfile(name, prop){
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for(var 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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//Write your function in between these comments
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lookUpProfile("Akira", "likes");
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```
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</section>
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