遨翔在知識的海洋裡----js(字串常用函式)

遨翔在知識的海洋裡發表於2018-03-26
JS字串函式
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
       
    </style>
</head>
<body>
    
    
    <script>
        var txt = "hello world,hello abc";
        var txt2 = "jie";
        var txt3 = "how are you doing today"

    // document.write(txt.length);  11

    // document.write(txt.charAt(1))  e

    // document.write(txt.concat(txt2)) hello world,hello abcjie

    // document.write(txt.indexOf("hello")); 0
    // document.write(txt.indexOf("world")); 6
    // document.write(txt.indexOf("World")); -1

    // document.write(txt.replace(/hello/,"jie")) jie world,hello abc
    // document.write(txt.replace(/hello/g,"jie")) jie world,jie abc

    // document.write(txt.search(/world/)) 6
    // document.write(txt.search(/worldss/)) -1
    // document.write(txt.search(/World/i)) 6

    // document.write(txt.slice(6)); world,hello abc
    // document.write(txt.slice(2,7)); llo world,hello abc
    
   // document.write(txt3.split(" ") + "<br/>") how,are,you,doing,today
   // document.write(txt3.split("") + "<br/>") h,o,w, ,a,r,e, ,y,o,u, ,d,o,i,n,g, ,t,o,d,a,y
   // document.write(txt3.split(" ",3)) how,are,you

    </script>
</body>
</html>
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