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C# LINQ find duplicates in List
Using LINQ, from a List<int> , how can I retrieve a list that contains entries repeated more than once and their values?
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What is the “double tilde” (~~) operator in JavaScript? [duplicate]
...t will always return a number, and will never give you NaN. If it can't be converted to a number, you'll get 0.
– RightSaidFred
May 11 '11 at 23:27
18
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Encode URL in JavaScript?
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Be careful. That escape converts non-ASCII characters into its Unicode escape sequences, like %uxxx.
– opteronn
Mar 5 '10 at 20:10
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What does “abstract over” mean?
...rature, I encounter the phrase "abstract over", but I don't understand the intent. For example , Martin Odersky writes
6 ...
Sort NSArray of date strings or objects
...Date dateWithString: s2];
return [d1 compare: d2];
}];
I suggest you convert all your strings to dates before sorting not to do the conversion more times than there are date items. Any sorting algorithm will give you more string to date conversions than the number of items in the array (someti...
ArrayBuffer to base64 encoded string
I need an efficient (read native) way to convert an ArrayBuffer to a base64 string which needs to be used on a multipart post.
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Why can't I make a vector of references?
...pes are also not allowed as components of containers, e.g. vector<const int> is not allowed.
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Why do we use volatile keyword? [duplicate]
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Consider this code,
int some_int = 100;
while(some_int == 100)
{
//your code
}
When this program gets compiled, the compiler may optimize this code, if it finds that the program never ever makes any attempt to change the value of some_int,...
How do you implement a class in C? [closed]
...verloading and/or virtual methods, you probably need to include function pointers in structures:
typedef struct {
float (*computeArea)(const ShapeClass *shape);
} ShapeClass;
float shape_computeArea(const ShapeClass *shape)
{
return shape->computeArea(shape);
}
This would let you implemen...
Linux automake自动编译全攻略 - C/C++ - 清泛网 - 专注C/C++及内核技术
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代码如下：
lib目录下头文件calc.h：
#include <stdio.h>
int add(int a, int b);
lib目录函数实现calc.c：
#include "calc.h"
int add(int a, int b)
{
return a + b;
}
主目录下测试代码test.c：
#include <stdio.h>
#include "lib/calc.h"
int main(i...