<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>string对象 </title>
<script type="text/javascript">
function demo(){
var mystr="Hello World!"
for(var i=0;i<mystr.length;i++){
var myposition=mystr.indexOf("o",i)
if(myposition==-1){
break;
}
else{
document.write(myposition+"<br>")}
}
}
demo();
</script>
</head>
<body>
</body>
</html>
这段代码怎么改能让结果只出现一次4和7？
2017-04-10
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>string对象 </title>
<script type="text/javascript">
function demo(){
var mystr="Hello World!"
for(var i=0;i<mystr.length;i++){
var myposition=mystr.indexOf("o",i)
var only=mystr.indexOf("o",(i+1))
if(myposition==-1){
continue;
}
else if(myposition==only){
continue;
}
else{
document.write(myposition+"<br>")}
}
}
demo();
</script>
</head>
<body>
</body>
</html>
不应该用break跳出 应该用continue跳过
举报
