This package contains vary of functions I found myself used quite often while dealing with leetcode questions. Feel free to let me know what's on your mind :D
npm install @windate3411/utils
const utils = require("@windate3411/utils")
uitls.isPrime(4);
//false
uitls.countElement([1,4,3,2,2,5,7,6])
//{ '1': 1, '2': 2,
'3': 1, '4': 1,
'5': 1, '6': 1,
'7': 1 }
uitls.permutaion([1,2,3])
//[ [ 1, 2, 3 ],
[ 1, 3, 2 ],
[ 2, 1, 3 ],
[ 2, 3, 1 ],
[ 3, 1, 2 ],
[ 3, 2, 1 ] ]
| function | description | params type | return data type |
|---|---|---|---|
| isPrime(num) | check if num is a prime number | number | boolean |
| countPrime(num) | count how many prime numbers between 0 and num | number | number |
| countElement(arr) | count elements in the array and return an object | array | object |
| combination(m,n) | return the number of combinations given C(m,n) | number | number |
| fraction(num) | return the fraction of num | number | number |
| permutaion(arr) | return the permutaions of given arr | array | array |
| objectSort(obj) | return sorted object alphabetically | object | object |
Danny Wang