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Named regular expression group “(?Pregexp)”: what does “P” stand for?
In Python, the (?P<group_name>…) syntax allows one to refer to the matched string through its name:
3 Answers
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Only mkdir if it does not exist [duplicate]
In my bash script I do:
5 Answers
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C++虚析构函数解析 - C/C++ - 清泛网 - 专注C/C++及内核技术
...析构基类而不析构派生类的状况发生。以下内容转自：http...为什么基类的析构函数是虚函数？
在实现多态时，当用基类操作派生类，在析构时防止只析构基类而不析构派生类的状况发生。
以下内容转自： http://blog.sina.com.cn/s/b...
优化InnerHTML操作 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...如下：
<html>
<head>
<title>test</title>
</head>
<body>
<div>
<p>data<p>
</div>
<script>
document.onmousedown = function() {
for (var i = 0; i < 10; i++) {
var p = document.createElement("p");
p.appendChild(document.createTextNode(Math.random()));
d...
How to paste in a new line with vim?
I often have to paste some stuff on a new line in vim. What I usually do is:
14 Answers
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Insert spaces between words on a camel-cased token [duplicate]
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See: .NET - How can you split a "caps" delimited string into an array?
Especially:
Regex.Replace("ThisIsMyCapsDelimitedString", "(\\B[A-Z])", " $1")
share
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Django optional url parameters
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There are several approaches.
One is to use a non-capturing group in the regex: (?:/(?P&lt;title&gt;[a-zA-Z]+)/)?
Making a Regex Django URL Token Optional
Another, easier to follow way is to have multiple rules that matches your needs, all...
What's the purpose of SQL keyword “AS”?
You can set table aliases in SQL typing the identifier right after the table name.
9 Answers
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Markdown `native` text alignment
Does markdown support native text-alignment without usage html + css ?
11 Answers
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LINQ to Entities does not recognize the method 'System.String ToString()' method, and this method ca
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Just save the string to a temp variable and then use that in your expression:
var strItem = item.Key.ToString();
IQueryable&lt;entity&gt; pages = from p in context.pages
where p.Serial == strItem
s...