String.prototype.replaceCharAt = function(n,c){ return this.substr(0, n)+ c + this.substr(n+1,this.length-1-n); }
Javascript --扩展String实现替换字符串中index处字符
时间: 2024-08-05 09:43:53
String.prototype.replaceCharAt = function(n,c){ return this.substr(0, n)+ c + this.substr(n+1,this.length-1-n); }
Javascript --扩展String实现替换字符串中index处字符