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Different ways of adding to Dictionary
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The performance is almost a 100% identical. You can check this out by opening the class in Reflector.net
This is the This indexer:
public TValue this[TKey key]
{
get
{
int index = this.FindEntry(key);
if (index >= 0)
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pythonic way to do something N times without an index variable?
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answered Jun 4 '10 at 0:42
Alex MartelliAlex Martelli
724k148148 gold badges11261126 silver badges13241324 bronze badges
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C++0x has no semaphores? How to synchronize threads?
Is it true that C++0x will come without semaphores? There are already some questions on Stack Overflow regarding the use of semaphores. I use them (posix semaphores) all the time to let a thread wait for some event in another thread:
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Should the hash code of null always be zero, in .NET
... what the hash code of null should be. It looks like the framework uses 0 :
9 Answers
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How to animate the change of image in an UIImageView?
...Transition *transition = [CATransition animation];
transition.duration = 1.0f;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transition.type = kCATransitionFade;
[imageView.layer addAnimation:transition forKey:nil];
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How do I get the last character of a string?
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public static void main(String args[]) {
String string = args[0];
System.out.println("last character: " +
string.substring(string.length() - 1));
}
}
The output of java Test abcdef:
last character: f
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How to get a property value based on the name
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answered Apr 1 '11 at 0:45
Matt GreerMatt Greer
55.4k1515 gold badges116116 silver badges121121 bronze badges
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9个常用iptables配置实例 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...p发来的包丢弃：
BLOCK_THIS_IP="x.x.x.x"
iptables -A INPUT -i eth0 -p tcp -s "$BLOCK_THIS_IP" -j DROP
以上命令设置将由x.x.x.x ip发往eth0网口的tcp包丢弃。
4.配置服务项
利用iptables，我们可以对日常用到的服务项进行安全管理，比如设定只能...
CSS selector for text input fields?
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edited Sep 4 '13 at 8:08
answered Nov 6 '10 at 16:30
Al...
Flexbox Not Centering Vertically in IE
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10 Answers
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