JS正则替换字符

[bing475879749]

<a href="1">dsrfewfdsf</a>
<a href="2">dsfdsf</a>
<a href="3">dsfdsafef</a>
<a href="4">dsfdfdssf</a>

a标签个数不定，把最后一个a标签替换掉

替换后为

<a href="1">dsrfewfdsf</a>
<a href="2">dsfdsf</a>
<a href="3">dsfdsafef</a>

[liangtiana]

用dom来做啊，简单多了

[打字员]

正则太水了，发个拙法子挣点分...

var s = '<v:shape style="1">111111<v:fill></v:fill></v:shape>\n<v:shape style="2">222222<v:fill></v:fill></v:shape>\n<v:shape style="3">333333<v:fill></v:fill></v:shape>\n<v:shape style="4">444444<v:fill></v:fill></v:shape>';
String.prototype.removeLastOne = function(key) {
	var i = j = 0;
	var reg = new RegExp('<(' + key + ').*?>[.\n]*?<\\/\\1>', 'gim');
	return this.replace(reg, function(v) {
		i++;
		return v;
	}).replace(reg, function(v) {
		j++;
		return (j == i)? '' : v;
	});
}
alert(s.removeLastOne('v:shape'));

[sohighthesky]

    <div id ="layer1">
<a href="1">dsrfewfdsf</a>
<a href="2">dsfdsf</a>
<a href="3">dsfdsafef</a>
<a href="4">dsfdfdssf</a>
asdfasdf
</div>
<script>
    var html = document.getElementById("layer1").innerHTML,
    reg = /(<a[^>]+>.*?<\/a>\n?)+/g;
    html = html.replace(reg, function($, $1){
        //reg.lastIndex -= $1.length 
        console.log(arguments)
        return $.replace(/<a[^>]+>.*?<\/a>\n$/g,"");
    });
    console.log(html)
</script>

[sohighthesky]

上面那个里面的应该在\n后加个?号
改成<v:shape>的话

html = '<v:shape style="1">111111<v:fill></v:fill></v:shape>\n<v:shape style="2">222222<v:fill></v:fill></v:shape>\n<v:shape style="3">333333<v:fill></v:fill></v:shape>\n<v:shape style="4">444444<v:fill></v:fill></v:shape>asdfsadf';
    var regstr = "<v:shape[^>]+>.*?</v:shape>\\n?",
    reg1 = new RegExp("("+ regstr + ")+", "g"),
    reg2 = new RegExp(regstr + "$");
    html = html.replace(reg1, function($){
        return $.replace(reg2, "");
    })
    console.log(html)

[挨踢直男]

<div id="div">
<a href="1">dsrfewfdsf</a>
<a href="2">dsfdsf</a>
<a href="3">dsfdsafef</a>
<a href="4">dsfdfdssf</a>
</div>
<script language="javascript">

var html = document.getElementById("div").innerHTML;
var regex = /<[^\/]*?>\w*<\/[^<]*>[\s]*$/;
html = html.replace(regex,"");
alert(html)
</script>

[rainsilence]

为什么不用dom来做？简单多了。。。

[bing475879749]

我的是这样的

<v:shape style="1">111111<v:fill></v:fill></v:shape>
<v:shape style="2">222222<v:fill></v:fill></v:shape>
<v:shape style="3">333333<v:fill></v:fill></v:shape>
<v:shape style="4">444444<v:fill></v:fill></v:shape>

[打字员]

再发一个，这个比较靠谱。。。

var b = '<v:shape style="1">111111<v:fill></v:fill></v:shape>\n<v:shape style="2">222222<v:fill></v:fill></v:shape>\n<v:shape style="3">333333<v:fill></v:fill></v:shape>\n<v:shape style="4">444444<v:fill></v:fill></v:shape>';
String.prototype.r = function(key) {
	var reg = new RegExp('<(' + key + ')[^>]*>.*?<\\/\\1>', 'img');
	return this.replace(reg, function(v) {
		return (RegExp.rightContext.match(reg) == null)? '' : v;
	});
}
alert(b.r('v:shape'));

顺便问一下LS的LS， console.log这个是撒？

[lazyboy_wu]

借用楼上的代码 呵呵

<script type="text/javascript">
var b = '<v:shape style="1">111111<v:fill></v:fill></v:shape>\n<v:shape style="2">222222<v:fill></v:fill></v:shape>\n<v:shape style="3">333333<v:fill></v:fill></v:shape>\n<v:shape style="4">444444<v:fill></v:fill></v:shape>';
String.prototype.r = function(key) {
	// var reg = /(?=<v:shape).*?<\/v:shape>((?:.|\s)(?!<v:shape))?$/i;
    var reg = new RegExp('(?=<' + key + ').*?<\/' + key + '>((?:.|\s)(?!<' + key + '))?$', 'i');    
    return this.replace(reg, '$1');
}
console.log(b.r('v:shape'));
</script>

[sohighthesky]

[Quote=引用 8 楼 danica7773 的回复:]
顺便问一下LS的LS， console.log这个是撒？
[/Quote]
打印日志信息
，firefox开firebug或者IE8打开开发人员工具，再或者Chrome可用，
除IE外，可以打印各种复杂对象 ，跟php的var_dump类似

[sohighthesky]

[Quote=引用 9 楼 hnxxwyq 的回复:]
借用楼上的代码 呵呵


JScript code


<script type="text/javascript">
var b = '<v:shape style="1">111111<v:fill></v:fill></v:shape>\n<v:shape style="2">222222<v:fill></v:fill></v:shape>\n<v:shape style="3">……
[/Quote]开始就想到用前瞻的，结果把那个写反了，没写出来，。。。。。

[bing475879749]

呵呵，用DOM做简单多了，原来v:shape是可以当作item取得