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Regular Expression Library - 0 views

  • Titleemail address (RFC 2822 mailbox)
  • ^((?>[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<angle><))?((?!\.)(?>\.?[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?(angle)>)$
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Google vs Xerox on R&D | Computerworld Blogs - 0 views

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    Google does R&D but has no dedicated researchers or formal lab organization. Every engineer is considered part of the virtual R&D team and is expected to donate 20% of his time - about one day a week - to research. Xerox takes the traditional approach, investing in a separate R&D function that includes basic research ... what makes each approach successful?
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    Not really a fair comparison -- what has Google's R&D produced? The Android?

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零宽断言_百度百科 - 0 views

shared by an mingli on 15 Apr 15 - No Cached
  • (?=exp)也叫零宽度正预测先行断言
  • 比如\b\w+(?=ing\b)
  • 比如(?<=\bre)\w+\b
  • ...16 more annotations...
  • (?<=exp)也叫零宽度正回顾后发断言
  • (?<=\s)\d+(?=\s)
  • 如果我们想查找这样的单词--它里面出现了字母q,但是q后面跟的不是字母u,我们可以尝试这样:
  • \b\w*q(?!u)\w*\b。
  • \b\w*q[^u]\w*\b匹配包含后面不是字母u的字母q的单词。但是如果多做测试(或者你思维足够敏锐,直接就观察出来了),你会发现,如果q出现在单词的结尾的话,像Iraq,Benq,这个表达式就会出错
  • 零宽度负预测先行断言(?!exp)
  • 断言此位置的后面不能匹配表达式exp
  • \d{3}(?!\d)
  • \b((?!abc)\w)+\b
  • (?<!exp),零宽度负回顾后发断言来断言此位置的前面不能匹配表达式exp
  • (?<![a-z])\d{7}
  • (?<=<(\w+)>).*(?=<\/\1>)
  • \1则是一个反向引用,引用的正是捕获的第一组,前面的(\w+)匹配的内容
  • 这样如果前缀实际上是<b>的话,后缀就是</b>了
  • 整个表达式匹配的是<b>和</b>之间的内容
  • 你想要给一个很长的数字中每三位间加一个逗号

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All about the Google+ 1 Button - 0 views

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    The Google + 1 button shows up on Google search results, on Google ads, and on other sites when you are signed in to your Google account. In case you like something you can click on the button. When somebody else comes on that particular page, he/she will know that you have +1′d the item.
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