使用正则表达式查找行开始 [英] Finding line beginning using regular expression

问题描述

我想从所有的 jQuery完成"中删除一个 4000 行的 HTML 文件.div 中的属性.

I want to strip a 4000-line HTML file from all the jQuery "done" attributes in a div.

<DIV class=menu done27="1" done26="0"
done9="1" done8="0" done7="1"
done6="0" done4="20">

应替换为:

<DIV class=menu>

在这个实验中，我可以用这个正则表达式来做:

In this experiment I can do it with this regular expression:

[ ^]done[0-9]+="[0-9]+"

使用 Notepad++ 5.6.8 Unicode，文件以 ANSI 编码，我将此正则表达式放在查找内容"中场地.它只替换以空格开头的 5 次出现，它将错过从行首开始的 2 次出现.

Using Notepad++ 5.6.8 Unicode, with a file encoded in ANSI, I'm putting this regex in the "Find what" field. It only replaces the 5 occurrences starting with a space, it will miss the 2 occurrences starting at the beginning of a line.

如何构造一个正则表达式来删除以关键字开头的 HTML 元素的所有属性?

How can I construct a regex to remove all the attributes of an HTML element starting with a keyword?

推荐答案

扩展将\n"替换为LINEBREAK"

非常感谢大家及时回复.按照你的建议，我做了以下事情:

Thanks a lot to all for these timely replies. Following your advices, here's what I did:

• Notepad++ > View > Show Symbol > Show End Of Line" 在每一行末尾显示CR+LF".
• "Notepad++ > Search > Find", "Search mode" = "Normal", 确保 "Find what" = "LINEBREAK" 什么也没找到
• "Search mode" = "Extended", "Find what" = "\n\r" 只找到双换行符(CR + LF + 一个空行)；"\n \r" 一无所获；然而 "\n" 确实能找到所有的换行符，而且只有它们.
• 将我的Towncar.htm"测试文件保存为Towncar_02.htm"(也以ANSI编码)
• 在扩展"下，将所有\n"替换为LINEBREAK"(注意尾随空格)

• 在正则表达式"下，替换每个出现的:

• "Notepad++ > View > Show Symbol > Show End Of Line" shows "CR+LF" at each line end.
• "Notepad++ > Search > Find", "Search mode" = "Normal", made sure that "Find what" = "LINEBREAK" finds nothing
• "Search mode" = "Extended", "Find what" = "\n\r" only finds the double-breaks (CR + LF + a blank line); "\n \r" find nothing; yet "\n" does find exactly all line breaks, and only them.
• Saving my "Towncar.htm" test file as "Towncar_02.htm" (also encoded in ANSI)
• Under "Extended", replaced all "\n" with "LINEBREAK " (notice the trailing space)

• Under "Regular expression", replaced each occurrence of:

 done[0-9]*="[0-9]*"

(在完成"之前要小心检查标题空间
并且没有尾随空间！见下文)

带有空字符串

• 在扩展"下，将每次出现的LINEBREAK"替换为\n"(这次在LINEBREAK"之后没有尾随空格！)
• 检查生成的Towncar.htm"文件(经过几次外观重新格式化后)看起来不错且漂亮，并且在刷新后，它仍然呈现与Towncar_02.htm"备份相同的效果.

回忆和笔记:

• 这个论坛显然在 Chrome 4 中运行良好；但是对于某些浏览器(例如 IE6 和其他已停产的浏览器)，在某些情况下会导致一些伪影；所以，要小心:
• 即使论坛没有在您的浏览器中显示它，也有一个标题空间，即在正则表达式的开头(上面的done..."正则表达式)和在里面，所以只用起始空格替换以done"开头的字符串，从而更确定不要用撤消"或美沙酮"或其他方式改变最终的其他字符串
• 同样，即使论坛在您的浏览器中显示了一个，Regex 末尾也没有尾随空格！
• 在正则表达式中，[0-9] 匹配 1 次且仅出现 1 次的任何十进制数字(0-9 范围内的字符)；IOW 它匹配 « 0 » 或 « 1 » 或 « 9 » 等，但不匹配 « 01 » 或 « 835 » 或 « »(空字符串)或任何一个.
• *(星号)匹配前一个字符的 0 次或多次(这里它匹配空字符串或任何专门由数字组成的字符串)
• 同样，+(加号)匹配前一个字符的 1 次或多次(这里它匹配任何字符串，至少 1 个字符长，仅由数字组成)
  参考:http://sourceforge.net/apps/mediawiki/notepad-plus/index.php?title=Regular_Expressions#Notepad.2B.2B_regex_syntax

• This forum apparently works well in Chrome 4; but with some browsers (e.g. IE6 and other discontinued ones), under some circumstances, it causes some artifacts; so, be careful:
• even if the forum doesn't show it in your browser, there is a heading space, i.e. at the beginning of the Regex (the " done..." Regular expression above) and inside it, so to replace only strings starting with " done", with the starting space, thus making even surer to NOT alter eventual other strings with "undone" or "methadone" or else
• same way, even if the forum shows one in your browser, there is no trailing space at the end of the Regex!
• in the Regex, [0-9] matches 1 and only 1 occurrence of any decimal digit (characters in the 0-9 range); IOW it matches « 0 » or « 1 » or « 9 » etc, but NOT « 01 » or « 835 » or « » (the empty string) or whichever.
• * (asterisk) matches 0 or more times the previous character (here it matches the empty string or any string made exclusively of digits)
• samewise, + (plus sign) matches 1 or more times the previous character (here it matches any string, at least 1 character long, made exclusively of digits)
  Ref: http://sourceforge.net/apps/mediawiki/notepad-plus/index.php?title=Regular_Expressions#Notepad.2B.2B_regex_syntax

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