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C++特化模板函数的符号多重定义错误问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
...perator> 和 operator== 对象的模板函数：
template <typename T>
int compare(T t1, T t2)
{
return t1==t2 ? 0 : t1 > t2 ? 1 : -1;
}
该模板根据地一个参数是否等于、大于、或小于第二个参数而分别返回零或+/-1。它是典型的用于集合排序时的排...
Sorting an ArrayList of objects using a custom sorting order
...g name;
private String phone;
private Address address;
public int compareTo(Contact other) {
return name.compareTo(other.name);
}
// Add/generate getters/setters and other boilerplate.
}
so that you can just do
List<Contact> contacts = new ArrayList<Contact&...
Static variable inside of a function in C
What will be printed out? 6 6 or 6 7? And why?
13 Answers
13
...
Segmentation fault on large array sizes
... on the heap you should be fine, assuming your machine has enough memory.
int* array = new int[1000000];
But remember that this will require you to delete[] the array. A better solution would be to use std::vector<int> and resize it to 1000000 elements.
...
Why shouldn't all functions be async by default?
...d now includes not just CPU computations but also some I/O? You'll need to convert the method to async but this would break API and all the callers up the stack would be needed to be updated as well (and they can even be different apps from different vendors). Or you'll need to add async version alo...
Why can't I define a static method in a Java interface?
EDIT: As of Java 8, static methods are now allowed in interfaces.
24 Answers
24
...
super() in Java
...uctor of the parent class.
OK, now let’s practically implement these points of super().
Check out the difference between program 1 and 2. Here, program 2 proofs our first statement of super() in Java.
Program 1
class Base
{
int a = 100;
}
class Sup1 extends Base
{
int a = 200;
vo...
Wrong requestCode in onActivityResult
...ect resultCode in your activity try this:
Change:
startActivityForResult(intent, 1);
To:
getActivity().startActivityForResult(intent, 1);
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What's the Best Way to Shuffle an NSMutableArray?
... NSMutableArray by providing
// methods to randomly shuffle the elements.
@interface NSMutableArray (Shuffling)
- (void)shuffle;
@end
// NSMutableArray_Shuffling.m
#import "NSMutableArray_Shuffling.h"
@implementation NSMutableArray (Shuffling)
- (void)shuffle
{
NSUInteger count = [self cou...
How to iterate for loop in reverse order in swift?
...can be used as below:
for index in stride(from: 5, to: 1, by: -1) {
print(index)
}
//prints 5, 4, 3, 2
for index in stride(from: 5, through: 1, by: -1) {
print(index)
}
//prints 5, 4, 3, 2, 1
Note that neither of those is a Range member function. They are global functions that return eit...