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MongoDB and “joins” [duplicate]
... database) on the other hand will resolve relationships and return them as if they were a single table (you "join two tables into one").
You can read more about DBRef here:
http://docs.mongodb.org/manual/applications/database-references/
There are two possible solutions for resolving references. O...
What ReSharper 4+ live templates for C# do you use? [closed]
...essFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
if (!disposed)
{
if (disposing)
{
if ($MEMBER$ != null)
{
$MEMBER$.Dispose();
$MEMBER$ = null;
}
}
disposed = true;
...
select、poll、epoll之间的区别总结[整理] - C/C++ - 清泛网 - 专注C/C++及内核技术
...1、select实现
select的调用过程如下所示：
（1）使用copy_from_user从用户空间拷贝fd_set到内核空间
（2）注册回调函数__pollwait
（3）遍历所有fd，调用其对应的poll方法（对于socket，这个poll方法是sock_poll，sock_poll根据情况会调用到...
Keyboard shortcuts in WPF
...implemented as RoutedCommands.
This enables the shortcut keys to work even if they're not hooked up to any controls. And since menu items understand keyboard gestures, they'll automatically display your shortcut key in the menu items text, if you hook that command up to your menu item.
Create stati...
Determine if code is running as part of a unit test
...ve a unit test (nUnit). Many layers down the call stack a method will fail if it is running via a unit test.
19 Answers
...
LINQ: Select an object and change some properties without creating a new object
... car.Color = color;
yield return car;
}
}
}
Now you can use it as follows.
cars.Where(car => car.Color == Color.Blue).ChangeColorTo(Color.Red);
share
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improve th...
How to execute a raw update sql with dynamic binding in rails
... f1=? where f2=? and f3=?")
st.execute(f1, f2, f3)
st.close
I'm not sure if there are other ramifications to doing this (connections left open, etc). I would trace the Rails code for a normal update to see what it's doing aside from the actual query.
Using prepared queries can save you a small am...
How can prepared statements protect from SQL injection attacks?
...t exactly true. MySQL has supported prepared statements for quite a while now. The PDO driver has as well. But yet, MySQL queries were still prepared by PDO by default, last time i checked.
– cHao
Aug 18 '13 at 9:32
...
How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
...ou're on 9.5 and don't need to be backward-compatible you can stop reading now.
9.4 and older:
PostgreSQL doesn't have any built-in UPSERT (or MERGE) facility, and doing it efficiently in the face of concurrent use is very difficult.
This article discusses the problem in useful detail.
In general y...
Does Go have “if x in” construct similar to Python?
Without iterating over the entire array, how can I check if x in array using Go? Does the language have a construct?
7 A...