Last active
April 4, 2018 13:12
-
-
Save sergey12313/53fd1eef7b77451dc3479c2745bc3ea5 to your computer and use it in GitHub Desktop.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| I Spy | |
| https://www.codewars.com/kata/555185132c0d4cca3d000197 | |
| function spyOn(func) { | |
| let callCount = 0; | |
| let args = []; | |
| let results = []; | |
| const result = (...arg) => { | |
| args.push(...arg) | |
| const returnValue = func.apply(this, arg); | |
| callCount += 1; | |
| results.push(returnValue) | |
| return returnValue; | |
| }; | |
| result.callCount = () => callCount; | |
| result.returned = value => results.includes(value); | |
| result.wasCalledWith = value => args.includes(value); | |
| return result; | |
| } | |
| ---------------------------------------------------------------------------------------------- | |
| Validate Credit Card Number | |
| https://www.codewars.com/kata/5418a1dd6d8216e18a0012b2 | |
| function validate(n){ | |
| const arr = n.toString().split(''); | |
| let sum = 0; | |
| for (let i = 0, length = arr.length; i < length; i += 1) { | |
| const condition = length % 2 === 0 ? i % 2 === 0 : i % 2 !== 0; | |
| const elem = arr[i]; | |
| let currentResult = elem; | |
| if (condition) { | |
| let mult = elem * 2; | |
| currentResult = mult > 9 ? mult - 9 : mult; | |
| } | |
| sum += +currentResult; | |
| } | |
| return (sum % 10 == 0) | |
| } | |
| ---------------------------------------------------------------------------------------------- | |
| Creating a string for an array of objects from a set of words | |
| https://www.codewars.com/kata/5877786688976801ad000100 | |
| function wordsToObject(input) { | |
| const arr = input.split(' '); | |
| const result = arr.reduce((acc, cur, index, arr) => { | |
| if(index % 2 === 0) acc += | |
| `${(index === 0)?'':', '}{name : \'${cur}\', id : \'${arr[index+1]}'\}` | |
| return acc; | |
| },'['); | |
| return `${result}]`; | |
| } | |
| ---------------------------------------------------------------------------------------------- | |
| Find the unique number | |
| https://www.codewars.com/kata/585d7d5adb20cf33cb000235 | |
| function findUniq(arr) { | |
| if(arr[0] !== arr[arr.length - 1]) { | |
| if(arr[0] === arr[1]) { | |
| return arr[arr.length - 1] | |
| } else { | |
| return arr[0] | |
| } | |
| } | |
| let result; | |
| for(let i = 1; i < arr.length - 1; i += 1 ){ | |
| if(arr[i] !== arr[0]) { | |
| result = arr[i]; | |
| break; | |
| } | |
| } | |
| return result; | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment