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September 22, 2013 08:01
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以特殊符号分割指定字符串。具体描述见评论
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| <!doctype html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Document</title> | |
| </head> | |
| <body> | |
| <div>\||di\|v|ab\@ca@大点的a:吧啊</div> | |
| <script> | |
| var str = document.querySelector("div").innerHTML; | |
| // alert(str) | |
| var reg = /((?:.*?(?:\\[\|\:\@])*)[^\\]*?)([\|\:\@]|[^\|\:\@]$)/gi; | |
| var ret = []; | |
| var length = str.length; | |
| str.replace(reg,function ($,$1,$2,ind) { | |
| console.log(arguments); | |
| if (ind + $.length < length) { | |
| $ = $.slice(0,-1); | |
| }; | |
| ret.push($); | |
| }) | |
| console.log(ret); | |
| </script> | |
| </body> | |
| </html> |
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在做MVVM库时，有这样一个场景，在标签上书写指令需要用|或者:分割开。
譬如
<div mv-attr="{{abc}}|filter_fn:otherthing"></div>。在这个场景中符号是确定的，比如|后的
filter_fn就是一个过滤函数，而:后的otherthing可能用于做其他用处。但将来可能需要添加@等其他符号，用于支持更多的指令。所以需要一段代码，在上述场景中，能按照指定符号（比如|:@&$等等）分割字符串，得到指令的各个部分，并知道其分隔符是什么。以便库可以进行相应的处理。
这段代码的主要作用就是于此。