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How would one write object-oriented code in C? [closed]
...
Basically you use a struct to hold both the data and a list of function pointers to point to the relevant functions for that data.
So, in a communications class, you would have an open, read, write and close call which would be maintained as four function pointers in the structure, alongside the d...
How to get existing fragments when using FragmentPagerAdapter
...d or tag for these created Fragments because FragmentPagerAdapter set them internally. So the problem is how to get a reference to them without that information...
Problem with current solutions: relying on internal code
A lot of the solutions I've seen on this and similar questions rely on gettin...
Struct inheritance in C++
....
// Program 1
#include <stdio.h>
class Base {
public:
int x;
};
class Derived : Base { }; // Is equivalent to class Derived : private Base {}
int main()
{
Derived d;
d.x = 20; // Compiler error because inheritance is private
getchar();
return 0;
}
// Program 2...
Is there a way to check if a file is in use?
... @ChrisW Why is that a bad thing. This community is here to point out good and bad answers. If a bunch of professionals notice this is a bad thing, and join to downvote, then the site is WAI. And before you get negative, if you read that article, they say to "upvote the right answer" no...
Property getters and setters
...you'll need something to backup the computed property. Try this:
class Point {
private var _x: Int = 0 // _x -> backingX
var x: Int {
set { _x = 2 * newValue }
get { return _x / 2 }
}
}
Specifically, in the Swift REPL:
15> var pt = Point()
pt: Point = {
_x = 0...
How to get Enum Value from index in Java?
..., MAY(5), JUN(6), JUL(7), AUG(8), SEP(9), OCT(10), NOV(11), DEC(12);
int monthOrdinal = 0;
Months(int ord) {
this.monthOrdinal = ord;
}
public static Months byOrdinal2ndWay(int ord) {
return Months.values()[ord-1]; // less safe
}
public static Months byOr...
Regular expressions in C: examples?
...xes in C (based on this):
#include <regex.h>
regex_t regex;
int reti;
char msgbuf[100];
/* Compile regular expression */
reti = regcomp(&regex, "^a[[:alnum:]]", 0);
if (reti) {
fprintf(stderr, "Could not compile regex\n");
exit(1);
}
/* Execute regular expression */
reti...
Getting multiple keys of specified value of a generic Dictionary?
...;
}
// Note potential ambiguity using indexers (e.g. mapping from int to int)
// Hence the methods as well...
public IList<TSecond> this[TFirst first]
{
get { return GetByFirst(first); }
}
public IList<TFirst> this[TSecond second]
{
get {...
Why can't C compilers rearrange struct members to eliminate alignment padding? [duplicate]
...data directly):
struct __attribute__((__packed__)) LocalFileHeader {
uint32_t signature;
uint16_t minVersion, flag, method, modTime, modDate;
uint32_t crc32, compressedSize, uncompressedSize;
uint16_t nameLength, extraLength;
};
The packed attribute prevents the compiler from alig...
FragmentPagerAdapter Exists Only In Android.Support.V4.App (and not Android.App)
... Support4
{
[Activity (Label = "@string/fragment_pager_support")]
[IntentFilter (new[]{Intent.ActionMain}, Categories = new[]{ "mono.support4demo.sample" })]
public class FragmentPagerSupport : Activity
//public class FragmentPagerSupport : FragmentActivity
{
const int NU...