To create a function which accepts an undetermined number of arguments, there are two methods depending on your environment.
5
Whenever a function is called, it has an Array-like arguments object in its scope, containing all the arguments passed to the function.
Indexing into or iterating over th...
This example uses Parallel.ForEach to calculate the sum of the numbers between 1 and 10000 by using multiple threads. To achieve thread-safety, Interlocked.Add is used to sum the numbers.
using System.Threading;
int Foo()
{
int total = 0;
var numbers = Enumerable.Range(1, 10000).ToLis...
This example uses Parallel.For to calculate the sum of the numbers between 1 and 10000 by using multiple threads. To achieve thread-safety, Interlocked.Add is used to sum the numbers.
using System.Threading;
int Foo()
{
int total = 0;
Parallel.For(1, 10001,
() => 0, // in...
When a response contains valid JSON, just use the .json() method on the Response object to get the decoded result:
response = requests.get('http://example.com/')
decoded_result = response.json()
However, this does not fail gracefully; it will raise a JSONDecodeError if the response object is no...
K&R
void* is a catch all type for pointers to object types. An example of this in use is with the malloc function, which is declared as
void* malloc(size_t);
The pointer-to-void return type means that it is possible to assign the return value from malloc to a pointer to any other type of ob...
+ dictionaryWithCapacity:
Creates and returns a mutable dictionary, initially giving it enough allocated memory to hold a given number of entries.
NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithCapacity:1];
NSLog(@"%@",dict);
- init
Initializes a newly allocated mut...
- removeObjectForKey:
Removes a given key and its associated value from the dictionary.
NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithDictionary:@{@"key1":@"Easy",@"key2": @"Tutorials"}];
[dict removeObjectForKey:@"key1"];
NSLog...
A declaration introduces an identifier and describes its type, be it a type, object, or function. A declaration is what the compiler needs to accept references to that identifier. These are declarations:
extern int bar;
extern int g(int, int);
double f(int, double); /* extern can be omitted for f...
To create an build target that creates an library, use the add_library command:
add_library(my_lib lib.cpp)
The CMake variable BUILD_SHARED_LIBS controls whenever to build an static (OFF) or an shared (ON) library, using for example cmake .. -DBUILD_SHARED_LIBS=ON. However, you can explicitly se...
Dim sites() As String = {"Stack Overflow", "Super User", "Ask Ubuntu", "Hardware Recommendations"}
Dim query = From x In sites Where x.StartsWith("S")
' result = "Stack Overflow", "Super User"
Query will be enumerable objec...
Dim sites() As String = {"Stack Overflow",
"Super User",
"Ask Ubuntu",
"Hardware Recommendations"}
Dim query = From x In sites Select x.Length
' result = 14, 10, 10, 24
Query...
Variables are SHADOWED and methods are OVERRIDDEN.
Which variable will be used depends on the class that the variable is declared of.
Which method will be used depends on the actual class of the object that is referenced by the variable.
class Car {
public int gearRatio = 8;
public St...
Casting an instance of a base class to a subclass as in : b = (B) a; is called narrowing (as you are trying to narrow the base class object to a more specific class object) and needs an explicit type-cast.
Casting an instance of a subclass to a base class as in: A a = b; is called widening and does...
This attribute can change the background of the Status Bar icons (at the top of the screen) to white.
<style name="AppTheme" parent="Theme.AppCompat">
<item name="android:windowLightStatusBar">true</item>
</style>
The navigation bar (at the bottom of the screen) can be transparent. Here is the way to achieve it.
<style name="AppTheme" parent="Theme.AppCompat">
<item name="android:windowTranslucentNavigation">true</item>
</style>
The Status Bar (t...
