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Get unique values from a list in python [duplicate]
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96
A Python list:
>>> a = ['a', 'b', 'c', 'd', 'b']
To get unique items, just transfor...
Secondary axis with twinx(): how to add to legend?
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84
From matplotlib version 2.1 onwards, you may use a figure legend. Instead of ax.legend(), which...
How to check that an element is in a std::set?
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84
std::set is typically implemented with an ordered tree structure, so count() and find() will both have O(logn). Neither will iterate over ...
Check if two linked lists merge. If so, where?
...t implementations usually provide for length
– keshav84
Sep 4 '10 at 8:28
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How do I use the new computeIfAbsent function?
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96
Suppose you have the following code:
import java.util.Map;
import java.util.concurrent.Concurr...
Java: using switch statement with enum under subclass
...ecause it is clearer on what the issue is.
– joaorodr84
Sep 30 '19 at 22:00
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Resize svg when window is resized in d3.js
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Rúnar Berg
2,58411 gold badge1414 silver badges2323 bronze badges
answered Sep 22 '14 at 15:55
cminatticminatti
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Why does volatile exist?
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Some processors have floating point registers that have more than 64 bits of precision (eg. 32-bit x86 without SSE, see Peter's comment). That way, if you run several operations on double-precision numbers, you actually get a higher-precision answer than if you were to truncate each interm...
How do you trigger a block after a delay, like -performSelector:withObject:afterDelay:?
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// Delay 2 seconds
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, Int64(2.0 * Double(NSEC_PER_SEC))), dispatch_get_main_queue()) { () -> Void in
println("Sum of times: \(time1 + time2)")
}
Objective C
CGFloat time1 = 3.49;
CGFloat time2 = 8.13;
// Delay 2 seconds
dispatch_after(...
CentOS 6.4下Squid代理服务器的安装与配置 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...：CentOS release 6.4 (Final)
Squid版本：squid-3.1.10-20.el6_5.3.x86_64
SELINUX=disabled
HTTP Service: stoped
三、安装Squid服务
3.1 检查squid软件是否安装
# rpm -qa|grep squid
3.2 如果未安装，则使用yum 方式安装
# yum -y install squid
3.3 设置开机自启动
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