大约有 30,000 项符合查询结果（耗时：0.0469秒） [XML]
Decimal number regular expression, where digit after decimal is optional
...ten like ^A?(B|C)$. Previously, it was written like ^A?B|C$ which actually means (^A?B)|(C$) which was incorrect. Note: ^(A?B|C)$ is also incorrect, because it actually means ^((A?B)|(C))$ which would not match "+.5".
– Hoylen
Sep 7 '14 at 13:16
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Find all files with name containing string
...
Use grep as follows:
grep -R "touch" .
-R means recurse. If you would rather not go into the subdirectories, then skip it.
-i means "ignore case". You might find this worth a try as well.
sh...
Group by in LINQ
...ant:
var results = from p in persons
group p.car by p.PersonId into g
select new { PersonId = g.Key, Cars = g.ToList() };
Or as a non-query expression:
var results = persons.GroupBy(
p => p.PersonId,
p => p.car,
(key, g) => new { PersonId = key, ...
Convert JSON to Map
...ou work with Maven project, you will need <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.4.4</version> </dependency>
– LoBo
Nov 2 '15 a...
Is there an easy way to check the .NET Framework version?
... }
// This line should never execute. A non-null release key should mean
// that 4.5 or later is installed.
return "No 4.5 or later version detected";
}
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淘宝应对双\"11\"的技术架构分析 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...带来了挑战。为此，我们设计了通用的数据中间层——glider——来屏蔽这个影响。glider以HTTP协议对外提供restful方式的接口。数据产品可以通过一个唯一的URL获取到它想要的数据。
以上是淘宝海量数据产品在技术架构方面的一...
What's the difference between & and && in MATLAB?
...ND operator that employs short-circuiting behaviour. Short-circuiting just means the second operand (right hand side) is evaluated only when the result is not fully determined by the first operand (left hand side)
A & B (A and B are evaluated)
A && B (B is only evaluated if A is true)
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How does UTF-8 “variable-width encoding” work?
...ng must be the shortest possible encoding for the character, which ends up meaning that bytes 0xC0 and 0xC1 cannot appear in UTF-8, for example; and, in fact, neither can 0xF5..0xFF. See the UTF-8 FAQ at unicode.org/faq/utf_bom.html, or unicode.org/versions/Unicode5.2.0/ch03.pdf
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`Apache` `localhost/~username/` not working
...rectory "/Users/kevin/Sites/">
Options Indexes MultiViews
AllowOverride None
Require all granted
</Directory>
Make sure to restart the Apache server afterwards with:
sudo apachectl restart
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Heroku error: “Permission denied (public key)”
...add <path-to-your-public-key>.
For example, heroku keys:add ~/.ssh/id_rsa.pub
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