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Declaration/definition of variables locations in ObjectiveC?
...o be declared in the header between the curly brackets { }:
// MyClass.h
@interface MyClass : NSObject {
int myVar;
}
@end
You were able to access these variables only in your implementation, but not from other classes. To do that, you had to declare accessor methods, that look something like...
ViewPager and fragments — what's the right way to store fragment's state?
Fragments seem to be very nice for separation of UI logic into some modules. But along with ViewPager its lifecycle is still misty to me. So Guru thoughts are badly needed!
...
How do I check if an integer is even or odd? [closed]
... two trivial test case programs:
/* modulo.c */
#include <stdio.h>
int main(void)
{
int x;
for (x = 0; x < 10; x++)
if (x % 2)
printf("%d is odd\n", x);
return 0;
}
/* and.c */
#include <stdio.h>
int main(void)
{
int x;
for (x = 0; x < 10...
Check time difference in Javascript
...diff = date2 - date1;
// 28800000 milliseconds (8 hours)
You can then convert milliseconds to hour, minute and seconds like this:
var msec = diff;
var hh = Math.floor(msec / 1000 / 60 / 60);
msec -= hh * 1000 * 60 * 60;
var mm = Math.floor(msec / 1000 / 60);
msec -= mm * 1000 * 60;
var ss = Ma...
How to delete items from a dictionary while iterating over it?
...t.keys() returns an iterator not a list.
As pointed out in comments simply convert mydict.keys() to a list by list(mydict.keys()) and it should work.
A simple test in the console shows you cannot modify a dictionary while iterating over it:
>>> mydict = {'one': 1, 'two': 2, 'three': 3...
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...
What is the maximum possible length of a .NET string?
...r as I can see, so an authoritative answer might require some knowledge of internals. Would the maximum change on a 64-bit system?
...
How to get duration, as int milli's and float seconds from ?
...at you're looking for?
#include <chrono>
#include <iostream>
int main()
{
typedef std::chrono::high_resolution_clock Time;
typedef std::chrono::milliseconds ms;
typedef std::chrono::duration<float> fsec;
auto t0 = Time::now();
auto t1 = Time::now();
fsec f...
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
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