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_JS TEST created by peterchuang - https://repl.it/@peterchuang/JS-TEST JS Coding questions
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| // Q1 | |
| // transform string to currency | |
| function toCurrency(input) { | |
| console.log('1_toCurrency'); | |
| } | |
| toCurrency('99000000.5566'); // will return '99,000,000.5566' |
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| // Q2 | |
| /* | |
| Write a method to decide if two strings are anagrams or not. | |
| Note: An anagram is a type of word play, the result of rearranging the letters of a word or phrase to produce a new word or phrase, using all the original letters exactly once. | |
| Example: | |
| anagram("I am a weakish speller", "William Shakespeare") | |
| true | |
| anagram("listen", "silent") | |
| true | |
| */ | |
| const anagram = (s1, s2) => { | |
| console.log('Q2_anagram'); | |
| } | |
| console.log( anagram('William Shakespeare', 'I am a weakish speller') ) | |
| console.log( anagram('silent', 'listen') ) |
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| // Q3 | |
| // Please complete the map function to traverse the tree to get the following result | |
| // the returned result will be | |
| /* | |
| { | |
| 'abc.def': true, | |
| 'abc.ghi': false, | |
| 'foo.bar': ['foo-bar'], | |
| 'foo.what.the.hack': 'hack', | |
| 'a.b.c.d': 123 | |
| 'a.b.c.e': () => {} // the function reference | |
| } | |
| */ | |
| const map = (input) => { | |
| console.log('Q3_map') | |
| return // return the result here | |
| } | |
| const tree = { | |
| abc: { | |
| def: true, | |
| ghi: false | |
| }, | |
| foo: { | |
| bar: ["foo-bar"], | |
| what: { | |
| the: { | |
| hack: 'hack' | |
| } | |
| } | |
| }, | |
| a: { | |
| b: { | |
| c: { | |
| d: 123, | |
| e: () => {}, | |
| } | |
| } | |
| } | |
| } | |
| console.log( map(tree) ) |
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| // Q4 | |
| const getUrl = (url, params) => { | |
| return url + +params['nickName']; | |
| } | |
| console.log(getUrl('/api/v1/user/{id}/profile', { | |
| id: 0, | |
| nickName: 'Lee Chen', | |
| description: 'Hello World! @.@' | |
| })) | |
| // should be '/api/v1/user/0/profile?nickName=Lee+Chen&description=Hello+World!%20%40.%40' |
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| // Q5 | |
| // complete the function to simulate a promise that fulfills the below usages | |
| const createPromise = (executor) => { | |
| } | |
| const promiseA = createPromise((resolve, reject) => { | |
| setTimeout(() => { | |
| resolve('yes') | |
| }, 100) | |
| }) | |
| promiseA.then((response) => { | |
| console.log('response should be yes', response) | |
| return { | |
| data: response | |
| } | |
| }).then((response) => { | |
| console.log('response.data should be yes', response.data) | |
| }).finally(() => { | |
| console.log('done') | |
| }) | |
| /* | |
| response should be yes: yes | |
| response.data should be yes: yes | |
| done | |
| */ | |
| const promiseB = createPromise((resolve, reject) => { | |
| setTimeout(() => { | |
| reject('no') | |
| }, 100) | |
| }) | |
| promiseB.catch((error) => { | |
| console.log('response should be no', error) | |
| return { | |
| data: response | |
| } | |
| }).catch((error) => { | |
| console.log('error.data should be no', error.data) | |
| }).finally(() => { | |
| console.log('done') | |
| }) | |
| /* | |
| error should be no: no | |
| error.data should be no: no | |
| done | |
| */ |
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| // Q6 | |
| // Please complete this function to satisfy the 4 usages below | |
| function add() { | |
| } | |
| console.log( 'add(1)(2)(3)', add(1)(2)(3) ); // should be 6 | |
| console.log( 'add(1, 2)(3)', add(1, 2)(3) ); // should be 6 | |
| console.log( 'add(1)(2, 3)', add(1)(2, 3) ); // should be 6 | |
| console.log( 'add(1, 2, 3)', add(1, 2, 3) ); // should be 6 |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width"> | |
| <title>repl.it</title> | |
| </head> | |
| <body> | |
| <script src="1_toCurrency.js"></script> | |
| <script src="2_anagram.js"></script> | |
| <script src="3_map.js"></script> | |
| <script src="4_geturl.js"></script> | |
| <script src="5_promise.js"></script> | |
| <script src="6_add.js"></script> | |
| <!--<script src="setTimeout.js"></script>--> | |
| </body> | |
| </html> |
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| // Please complete this function to satisfy the 4 usages below | |
| function add() { | |
| } | |
| console.log( 'add(1)(2)(3)', add(1)(2)(3) ); // should be 6 | |
| console.log( 'add(1, 2)(3)', add(1, 2)(3) ); // should be 6 | |
| console.log( 'add(1)(2, 3)', add(1)(2, 3) ); // should be 6 | |
| console.log( 'add(1, 2, 3)', add(1, 2, 3) ); // should be 6 |
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