codewars练习（javascript）-2021/2/1

文章目录

codewars-js练习
- 2021/2/1
- - github 地址
  - 【1】<7kyu>【Anagram Detection】
  - 【2】<7kyu>【Round up to the next multiple of 5】
  - 【3】<7kyu>【Mumbling】

codewars-js练习

2021/2/1

github 地址

my github地址，上面有做的习题记录，不断更新…

【1】<7kyu>【Anagram Detection】

An anagram is the result of rearranging the letters of a word to produce a new word (see wikipedia).

Note: anagrams are case insensitive

Complete the function to return true if the two arguments given are anagrams of each other; return false otherwise.

字谜是将一个单词的字母重新排列以产生一个新单词的结果。注意:字谜不区分大小写。如果给定的两个参数是彼此的字谜，则完成函数返回true;否则返回false。

example：

"foefet" is an anagram of "toffee""Buckethead" is an anagram of "DeathCubeK"

solution

<script type="text/javascript">var isAnagram = function(test, original) {// 全部转为大写或小写方便比较，此处使用的全部小写// 排序var tStr = test.toLowerCase().split('').sort().join('');var oStr = original.toLowerCase().split('').sort().join('');console.log(tStr,oStr);if(oStr===tStr){return true;}return false;};// 验证console.log(isAnagram("foefet", "toffee"));//trueconsole.log(isAnagram("Twoo", "WooT"));// trueconsole.log(isAnagram("dumble", "bumble"));//falseconsole.log(isAnagram("ound", "round"));// falseconsole.log(isAnagram("Buckethead", "DeathCubeK"));// trueconsole.log(isAnagram("apple", "pale"));// false</script>

【2】<7kyu>【Round up to the next multiple of 5】

Given an integer as input, can you round it to the next (meaning, “higher”) multiple of 5?

四舍五入到下一个5的倍数

example：

input:    output:
0    ->   0
2    ->   5
3    ->   5
12   ->   15
21   ->   25
30   ->   30
-2   ->   0
-5   ->   -5
etc.

solution

<script type="text/javascript">function roundToNext5(n){console.log('n',n);if(n %5 !=0){return (Math.floor(n/5)+1)*5;}return n;}// 验证[[0,0],[1,5],[3,5],[5,5],[7,10],[39,40],[-2,0],[-5,-5]].forEach(([x,out])=> console.log(roundToNext5(x), out));</script>

【3】<7kyu>【Mumbling】

example：

accum("abcd") -> "A-Bb-Ccc-Dddd"
accum("RqaEzty") -> "R-Qq-Aaa-Eeee-Zzzzz-Tttttt-Yyyyyyy"
accum("cwAt") -> "C-Ww-Aaa-Tttt"

solution

<script type="text/javascript">function accum(s) {// console.log(s);var result = [s[0]];for(var i=1;i<s.length;i++){var ss = s[i].toUpperCase() + new Array(i+1).join(s[i].toLowerCase());// console.log(ss);result.push(ss);}return result.join('-');}// 验证console.log(accum("ZpglnRxqenU"));// "Z-Pp-Ggg-Llll-Nnnnn-Rrrrrr-Xxxxxxx-Qqqqqqqq-Eeeeeeeee-Nnnnnnnnnn-Uuuuuuuuuuu"</script>

知识点：重复n次

function repeatString(str,n) {return new Array(n+1).join(str);
}
repeatString("a",3) // "aaa"

以上为自己思路供大家参考，可能有更优的思路。