关于字符串的两道题

js关于字符串的两道题

1.编写函数rightchange(char,n),实现字符串char 循环右移n位

  function rightchange(char,n){
var arr = char.split("");
n = n % arr.length;//取余
for(var i=1;i<=n;i++){
arr.unshift(arr.pop());
}
console.log(arr.join(""));
}
rightchange("abcdefg",8);

2 编写函数maxr(char)返回字符串char中最长的连续重复字母

 function maxr(char){
var a = 0;
var b=1;

var maxlength = 0;
var maxchar = "";

while(a<=char.length-2){
if(char.charAt(a) == char.charAt(b)){
b++;
}else{
if(b-a>maxlength){
maxlength = b-a;
maxchar = char.slice(a,b);
}
a = b;
b = a+1;
}
}
console.log(maxchar,maxlength);
}
var str = "mmjiiikkkmmmmmmmmllllllllllllllllllmlll"
maxr(str);
posted @ 2017-05-13 11:41  circe  阅读(...)  评论(...编辑  收藏