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Fastest way to check if a value exists in a list
What is the fastest way to know if a value exists in a list (a list with millions of values in it) and what its index is?
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Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
Awk学习笔记awk是一种编程语言，用于在linux unix下对文本和数据进行处理。数据可以来自标准输入、一个或多个文件，或其它命令的输出。它支持用户自定义函数和动态正则表达式等先进功能，是linux unix下的一个强大编程工具。
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List OrderBy Alphabetical Order
... looking to quickly sort a Generic List<T> . For the sake of this example, let's say I have a List of a Person type with a property of lastname. How would I sort this List using a lambda expression?
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How to get the client IP address in PHP [duplicate]
...s the most reliable value you can find.
However, they can be behind a proxy server in which case the proxy may have set the $_SERVER['HTTP_X_FORWARDED_FOR'], but this value is easily spoofed. For example, it can be set by someone without a proxy, or the IP can be an internal IP from the LAN behind...
How to assign colors to categorical variables in ggplot2 that have stable mapping?
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For simple situations like the exact example in the OP, I agree that Thierry's answer is the best. However, I think it's useful to point out another approach that becomes easier when you're trying to maintain consistent color schemes across multiple data fr...
Swift Beta performance: sorting arrays
..., 2, 2, 5, 8, 1234]
Both are called in the same program as written.
var x_swift = CInt[](count: n, repeatedValue: 0)
var x_c = CInt[](count: n, repeatedValue: 0)
for var i = 0; i < n; ++i {
x_swift[i] = CInt(random())
x_c[i] = CInt(random())
}
let swift_start:UInt64 = mach_absolute_ti...
What does the restrict keyword mean in C++?
...per, it's interesting and worth the time.
Edit
I also found that IBM's AIX C/C++ compiler supports the __restrict__ keyword.
g++ also seems to support this as the following program compiles cleanly on g++:
#include <stdio.h>
int foo(int * __restrict__ a, int * __restrict__ b) {
return...
Python: avoid new line with print command [duplicate]
...command, it prints whatever I want and then goes to a different line. For example:
5 Answers
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How to dynamic new Anonymous Class?
In C# 3.0 you can create anonymous class with the following syntax
3 Answers
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