match、replace、search、split

最新推荐文章于 2022-11-15 08:54:20 发布

昭惠显圣二郎真君

最新推荐文章于 2022-11-15 08:54:20 发布

阅读量280

点赞数

分类专栏： JavaScript

JavaScript 专栏收录该内容

4 篇文章

订阅专栏

本文通过实例介绍了JavaScript中字符串方法的应用，包括使用match()方法查找所有匹配的子串、利用replace()方法进行字符串替换、借助search()方法定位特定模式的位置以及采用split()方法按指定分隔符分割字符串。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

<title>字符串对象match()方法的使用</title>
<script language="JavaScript">
{
var mymatch=new Array();
var s="nerver give up the pursuit of learning,nerver!nerver!";
var regex=/nerver/ig;
mymatch = s.match(regex);
document.write(mymatch+"<br>");
document.write("最近一次匹配的字符未："+"<br>"+RegExp.input+"<br>"+"<br>");
document.write("匹配子串的个数为:"+mymatch.length+"<br>");
for(i=0;i<mymatch.length;i++)
{
document.write("第"+i+"个匹配子串未:"+mymatch[i]+"<br>");
}
document.write("<br>"+"最近一次搜索的开始位置为："+RegExp.index+"<br>");
document.write("下次搜索的开始位置为："+RegExp.lastIndex+"<br>");
document.write("最近一次匹配的字符前面的子串为："+"<br>"+RegExp.leftContext+"<br>");
document.write("最近一次匹配的字符前面的子串为：" + RegExp.rightContext + "<br>");
}

</script>

<title>字符串对象replace()方法的使用</title>
<script language="JavaScript">
{
var beforeString = "nerver give up the pursuit of learning,nerver!nerver!"
//var regex = /nerver/ig;
var regex = new RegExp("nerver", "ig");
document.write("替换前的字符串为：" + "<br>" + beforeString + "<br>");
var afterString = beforeString.replace(regex, "I will nerver");
document.write("替换后的字符串为:" + "<br>" + afterString + "<br>");
}
</script>

<title>字符串对象search()方法的使用</title>
<script language="JavaScript">
{
var myString = "nerver give up the pursuit of learning,nerver!nerver!";
var regex = /pursuit/;
var index = myString.search(regex);
document.write("在字符串\'" + myString + "\'的第" + index + "个字符位置找到匹配找到匹配模式:" + regex);
}
</script>

<title>split</title>
<script language="JavaScirpt">
{
var myArray = new Array();
var s = "nerver,give up,the,pursuit,of learning!";
var regex = /,/;
myArray = s.split(regex);
document.write("原字符串为:\'" + s + "\'<br>");
document.write("分割后的字符串为：<br>");
for (i = 0; i < myArray.length; i++)
{
document.write(myArray[i] + "<br>");
}
}
</script>