An object pointer (including void*) or function pointer can be converted to an integer type using reinterpret_cast. This will only compile if the destination type is long enough. The result is implementation-defined and typically yields the numeric address of the byte in memory that the pointer poin...
To view line numbers from Default view enter
:set number
To hide line numbers
:set nonumber
There is also a shortcut for above. nu is same as number.
:set nonu
To hide line numbers, we can also use
:set nu!
int main (void)
{
const int foo_readonly = 10;
int *foo_ptr;
foo_ptr = (int *)&foo_readonly; /* (1) This casts away the const qualifier */
*foo_ptr = 20; /* This is undefined behavior */
return 0;
}
Quoting ISO/IEC 9899:201x, section 6.7.3 §2:
If an attempt i...
Format strings may contain named placeholders that are interpolated using keyword arguments to format.
Using a dictionary (Python 2.x)
>>> data = {'first': 'Hodor', 'last': 'Hodor!'}
>>> '{first} {last}'.format(**data)
'Hodor Hodor!'
Using a dictionary (Python 3.2+)
>>...
Note: This example is based on the Oracle JVM implementation.
Built-in tools like jmap, jconsole, and jvisualvm are available in a JDK and can be used to generate and analyze heap memory dumps taken from a running JVM application. However, one option to generate a heap dump without using JDK tools ...
class (Functor t, Foldable t) => Traversable t where
{-# MINIMAL traverse | sequenceA #-}
traverse :: Applicative f => (a -> f b) -> t a -> f (t b)
traverse f = sequenceA . fmap f
sequenceA :: Applicative f => t (f a) -> f (t a)
sequenceA = t...
To calculate moving average of salary of the employers based on their role:
val movAvg = sampleData.withColumn("movingAverage", avg(sampleData("Salary"))
.over( Window.partitionBy("Role").rowsBetween(-1,1)) )
withColumn() creates a new column named m...
Always use Rails.logger.{debug|info|warn|error|fatal} rather than puts. This allows your logs to fit into the standard log format, have a timestamp and have a level so you choose whether they are important enough to be shown in a specific environment. You can see the separate log files for your appl...
By default the Custom Tool property for a VB resource file is VbMyResourcesResXFileCodeGenerator. However, with this code generator the view (XAML) will not be able to access the resources. To solve this problem add Public before the Custom Tool property value.
To select the Resources.resx file in ...
Computed observables are functions that can "watch" or "react" to other observables on the view model. The following example shows how you would display the total number of users and the average age.
Note: The example below can also make use of pureComputed() (introduced in v3....
The format of the struct statement is this:
struct [structure tag]
{
member definition;
member definition;
...
member definition;
} [one or more structure variables];
Example: declare the ThreeFloats structure:
typedef struct {
float x, y, z;
} ThreeFloats;
@inter...
The pause() method is one of the easiest solution Protractor provides you to debug the code, in order to use it you have to add it in your code where you want to pause the execution.Once the execution is in paused state:
You can use C (type C) to move forward. Be careful while using it, you hav...
' Making a factory with parameter to the class
Public Function new_Car(wheels)
Set new_Car = New Car
new_Car.Wheels = wheels
End Function
' Creating a car through a factory
Dim semiTrailer
Set semiTrailer = new_Car(18)
Conversion SpecifierType of ArgumentDescriptioni, dintprints decimaluunsigned intprints decimalounsigned intprints octalxunsigned intprints hexadecimal, lower-caseXunsigned intprints hexadecimal, upper-casefdoubleprints float with a default precision of 6, if no precision is given (lower-case used f...
This example shows the process from designing the shape you want to drawing it on a view. A specific shap is used but the concepts you learn can be applied to any shape.
How to draw a Bézier path in a custom view
These are the main steps:
Design the outline of the shape you want.
Divide the ou...
The example below shows how to add a navigation bar button (called a UIBarButtonItem) in the Interface Builder.
Add a Navigation Controller to your Storyboard
Select your View Controller and then in the Xcode menu choose Editor > Embed In > Navigation Controller.
Alternatively, you could ...
Test methods often need data to be tested with. To test some methods completely you need to provide different data sets for every possible test condition. Of course, you can do it manually using loops, like this:
...
public function testSomething()
{
$data = [...];
foreach($data as $dat...
