<!DOCTYPE?HTML>
<html>
<head>
<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8">
<title>string對象</title>
<script?type="text/javascript">
var?mystr="Hello?World!"
document.write(????mystr.substring(6)?????+?"<br?/>");
document.write(?????mystr.substring(0,6)??????????????);
</script>
</head>
<body>
</body>
</html>空格也是一個字符,我發現但提取Hello時,右有空格,那么請問mystr.substring(0,6)和mystr.substring(0,5)有什么區別?有什么規定的嗎?
提取字符串substring()
晴書文文
2016-05-23 23:22:36