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Why does X[Y] join of data.tables not allow a full outer join, or a left join?
This is a bit of a philosophical question about data.table join syntax. I am finding more and more uses for data.tables, but still learning...
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REST API Token-based Authentication
I'm developing a REST API that requires authentication. Because the authentication itself occurs via an external webservice over HTTP, I reasoned that we would dispense tokens to avoid repeatedly calling the authentication service. Which brings me neatly to my first question:
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What's the difference between “groups” and “captures” in .NET regular expressions?
I'm a little fuzzy on what the difference between a "group" and a "capture" are when it comes to .NET's regular expression language. Consider the following C# code:
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Enabling auto layout in iOS 6 while remaining backwards compatible with iOS 5
What is the best way to take advantage of the new auto layout features of iOS 6 while still providing compability with older devices on earlier versions of iOS?
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What is the shortest way to pretty print a org.w3c.dom.Document to stdout?
...at is the easiest way to pretty print (a.k.a. formatted) a org.w3c.dom.Document to stdout?
6 Answers
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Why do we copy then move?
I saw code somewhere in which someone decided to copy an object and subsequently move it to a data member of a class. This left me in confusion in that I thought the whole point of moving was to avoid copying. Here is the example:
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Why is an int in OCaml only 31 bits?
Haven't seen this "feature" anywhere else. I know that the 32nd bit is used for garbage collection. But why is it that way only for ints and not for the other basic types?
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What does the -u flag mean in git push -u origin master? [closed]
I was just wondering what does the -u flag mean in this command?
2 Answers
2
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phpcms 启用手机门户（自动判断手机浏览器） - 更多技术 - 清泛网 - 专注C/...
...简析这个域名到你的服务器地址。
2、修改\caches\configs\route.php 文件，增加手机路由地址，方法如下：
return array(
'default'=array('m'='content', 'c'='index', 'a'='init'),
'm.xxx.com'=array('m'='wap', 'c'='index', 'a'='init'),
);
3、到phpcms...
How do I tell git to always select my local version for conflicted merges on a specific file?
... I'm collaborating with someone via a git repository, and there is a particular file that I never want to accept any external changes to.
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