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Methods for intercepting, splicing, and replacing characters

一个新手Original: 2017-10-02 09:45:501632browse

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>截取，拼接字符串</title>
<script type="text/javascript">
var str = "abc八dccef维jaagk研sew修wwq学rrt院mn";
/* 1.挨个从str中获取 八维研修学院 这几个字符,将获取的单个字符再拼接成完整的字符串 */
document.write("1. 挨个
截取字符
："+"<br/><br/>");
var bwie1 = document.write(str.
substring
(3,4)+"  ");
var bwie2 = document.write(str.
substring
(9,10)+"  ");
var bwie3 = document.write(str.
substring
(15,16)+"  ");
var bwie4 = document.write(str.
substring
(19,20)+"  ");
var bwie5 = document.write(str.
substring
(23,24)+"  ");
var bwie6 = document.write(str.
substring
(27,28)); 
       
var n = document.write("<br/><br/><br/>"+"2.
拼接字符串
:<br/><br/>");
var newStr = document.write(str.substring(3,4).
concat
(
str.substring(9,10),
str.substring(15,16),
str.substring(19,20),
str.substring(23,24),
str.substring(27,28))
);

/* 2.使用字符串替换 replace() 的方式获取 八维研修学院 字符串 */
var r = document.write("<br/><br/><br/>"+"3.
替换字符串
:<br/><br/>");
var new_replace = document.write( str.
replace
(str,"八维研修学院"));
</script>
</head>
<body>
</body>
</html>

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