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ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C++内核技术
... 为了强化这个原则，ØMQ严格地分离拓扑的建立（zmq_bind,zmq_connect）和真实消息的传递（zmq_send,zmq_rev)。 前者同底层的传输地址协同工作，比如IP地址，而后者仅仅使用处理器（文件描述符）去定位具体的拓扑： /* Topology esta...
When to use thread pool in C#? [closed]
...l vs. create my own threads. One book recommends using a thread pool for small tasks only (whatever that means), but I can't seem to find any real guidelines. What are some considerations you use when making this programming decision?
...
How do I programmatically change file permissions?
...issions using EnumSet.of(), but the helper method PosixFilePermissions.fromString() will uses a conventional format that will be more readable to many developers. For APIs that accept a FileAttribute, you can wrap the set of permissions with with PosixFilePermissions.asFileAttribute().
Set<Posix...
Confused by python file mode “w+”
...to the top of the file before reading, otherwise you'll just read an empty string
data = f.read() # Returns 'somedata\n'
Note the f.seek(0) -- if you forget this, the f.read() call will try to read from the end of the file, and will return an empty string.
...
Copy object values in Visual Studio debug mode
...ich is type System.Collections.Generic.List 1[[System.ValueTuple 3[[System.String, System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.String, System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.String, Sys...
Ubuntu, vim, and the solarized color palette
...e
gconftool-2 --set "/apps/gnome-terminal/profiles/Default/palette" --type string "#070736364242:#D3D301010202:#858599990000:#B5B589890000:#26268B8BD2D2:#D3D336368282:#2A2AA1A19898:#EEEEE8E8D5D5:#00002B2B3636:#CBCB4B4B1616:#58586E6E7575:#65657B7B8383:#838394949696:#6C6C7171C4C4:#9393A1A1A1A1:#FDFDF6...
How do I set a column value to NULL in SQL Server Management Studio?
...value and clicking enter will not create a NULL value. If the column is a string datatype (varchar and the like), it will create an empty string. If the column is a numeric datatype (int and the like) it will pop up an Invalid Value error. And so on. NULL is the absence of a value, and is does no...
Why can't overriding methods throw exceptions broader than the overridden method?
... System.out.println(" child ");
}
public static void main(String[] args) {
Parent parent = new Child();
parent.name();// output => child
}
}
The program will compile successfully.
Example 2:
public class Parent {
public void name() throws Runti...
Multiline Comment Workarounds?
...n answer that doesn't require correct syntax, although it is more for here-string type documenting and commenting than simple code-block enable/disable toggle.
– Thell
Nov 22 '12 at 1:33
...
Ternary operator in AngularJS templates
...-class takes an expression that must evaluate to one of the following:
a string of space-delimited class names
an array of class names
a map/object of class names to boolean values.
An example of 1) was given above. Here is an example of 3, which I think reads much better:
<li ng-class="...