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Why is it impossible to override a getter-only property and add a setter? [closed]
... { return _currentBar; }
}
Since Bar cannot be set as per the BaseClass interface, BarProvider assumes that caching is a safe thing to do - Since Bar cannot be modified. But if set was possible in a derivation, this class could be serving stale values if someone modified the _source object's Bar ...
appending array to FormData and send via AJAX
...
You have several options:
Convert it to a JSON string, then parse it in PHP (recommended)
JS
var json_arr = JSON.stringify(arr);
PHP
$arr = json_decode($_POST['arr']);
Or use @Curios's method
Sending an array via FormData.
Not recommended: Seriali...
Using two values for one switch case statement
...
class SwitchDemo {
public static void main(String[] args) {
int month = 2;
int year = 2000;
int numDays = 0;
switch (month) {
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
c...
Difference between null and empty (“”) Java String
...not, 20 is a number). Same case for null: it's not a string, but it can be converted to one if you try to add it.
– daboross
Mar 4 '18 at 9:13
...
When would you use delegates in C#? [closed]
...here takes a delegate as a parameter. Since delegates are just function pointers when you pass the method name into the .Where(delegate) that becomes the delegate. Since inMyFamily returns a boolean type it is actually considered a predicate. Predicates are just delegates that return booleans.
...
How to count the number of set bits in a 32-bit integer?
..., you may need to adjust it to work for a particular language (e.g. using uint32_t for C++ and >>> in Java):
int numberOfSetBits(uint32_t i)
{
// Java: use int, and use >>> instead of >>
// C or C++: use uint32_t
i = i - ((i >> 1) & 0x55555555);
...
How to escape JSON string?
...s = JsonConvert.ToString(@"a\b");
Console.WriteLine(s);
....
This code prints:
"a\\b"
That is, the resulting string value contains the quotes as well as the escaped backslash.
share
|
improve th...
Count character occurrences in a string in C++
...heck if c equals '_'
If yes, increase count
EDIT: C++ example code:
int count_underscores(string s) {
int count = 0;
for (int i = 0; i < s.size(); i++)
if (s[i] == '_') count++;
return count;
}
Note that this is code to use together with std::string, if you're using char*, re...
For every character in string
...
A for loop can be implemented like this:
string str("HELLO");
for (int i = 0; i < str.size(); i++){
cout << str[i];
}
This will print the string character by character. str[i] returns character at index i.
If it is a character array:
char str[6] = "hello";
for (int i = 0; st...
What is 'Pattern Matching' in functional languages?
...-like functional languages allow you define simple data types called "disjoint unions" or "algebraic data types". These data structures are simple containers, and can be recursively defined. For example:
type 'a list =
| Nil
| Cons of 'a * 'a list
defines a stack-like data structure. Thin...