1 //返回指定位置字符charAt: 2 var mystr="I love you!"; 3 console.log(mystr.charAt(3)); 4 //"o"
1 //返回字符串首次出现位置indexOf: 2 var mystr="I love you!"; 3 console.log(mystr.indexOf("o")); 4 //3 5 console.log(mystr.indexOf('o',4)); 6 //-1
1 //截取字符串substring: 2 var mystr='ceshi yixia'; 3 console.log(mystr.substring(2,2)); 4 //"" 5 console.log(mystr.substring(2,5)); 6 //"shi" 7 console.log(mystr.substring(5,2)); 8 //"shi"
1 //指定截取长度substr: 2 var mystr="Hello World!"; 3 console.log( mystr.substr(6,5)); 4 //World 5 console.log( mystr.substr(0,5)); 6 //Hello
1 //字符串反序 2 var str="i love you"; 3 str.split('').reverse().join(''); 4 //uoy evol i