Some character may be reserved for HTML and cannot be used directly as it may obstruct the actual HTML codes. For example, trying to display the left and right angle brackets (<>) in the source code may cause unexpected results in the output. Similarly, white spaces as written in the source co...
When applied to a single-argument constructor, prevents that constructor from being used to perform implicit conversions.
class MyVector {
public:
explicit MyVector(uint64_t size);
};
MyVector v1(100); // ok
uint64_t len1 = 100;
MyVector v2{len1}; // ok, len1 is uint64_t
int len2 ...
Haskell supports importing a subset of items from a module.
import qualified Data.Stream (map) as D
would only import map from Data.Stream, and calls to this function would require D.:
D.map odd [1..]
otherwise the compiler will try to use Prelude's map function.
It is unlikely that someone uses an unsupported version of Django, and at his own risks. If ever someone does, it must be his concern to know if a feature exists in the given version.
Considering the above, it is useless to mention specificities of an unsupported version.
1.6
This kind of block i...
Dependencies can be added for specific product flavors in a similar fashion as build configurations.
android {
...
productFlavors {
flavor1 {
//...
}
flavor2 {
//...
}
}
}
dependencies {
flavor1Compile 'com.and...
A conversion that involves calling an explicit constructor or conversion function can't be done implicitly. We can request that the conversion be done explicitly using static_cast. The meaning is the same as that of a direct initialization, except that the result is a temporary.
class C {
std:...
static_cast can perform any implicit conversion. This use of static_cast can occasionally be useful, such as in the following examples:
When passing arguments to an ellipsis, the "expected" argument type is not statically known, so no implicit conversion will occur.
const double x = ...
Interpolation means that Perl interpreter will substitute the values of variables for their name and some symbols (which are impossible or difficult to type in directly) for special sequences of characters (it is also known as escaping). The most important distinction is between single and double qu...
Assume you have a custom file you want to create an importer for. It could be an .xls file or whatever. In this case we're going to use a JSON file because it's easy but we're going to pick a custom extension to make it easy to tell which files are ours?
Let's assume the format of the JSON file is
...
The "right-left" rule is a completely regular rule for deciphering C declarations. It can also be useful in creating them.
Read the symbols as you encounter them in the declaration...
* as "pointer to" - always on the left side
[] as "array of" ...
To get a value associated to the key, use the .get() method. If there's no value associated to the key, it returns undefined.
const obj1 = {},
obj2 = {};
const weakmap = new WeakMap([[obj1, 7]]);
console.log(weakmap.get(obj1)); // 7
console.log(weakmap.get(obj2)); // undefined
Returns a table with a rows containing the values that were actual (current) at the specified point in time in the past.
SELECT * FROM Employee
FOR SYSTEM_TIME AS OF '2016-08-06 08:32:37.91'
BEGIN
FOR x IN (SELECT * FROM emp WHERE sal < 100) LOOP
dbms_Output.Put_Line(x.eName ||' '||x.sal||'... should REALLY be raised :D');
END LOOP;
END;
/
First advantage is there is no tedious declaration to do (think of this horrible "CURSOR" thing you had in previous ve...
What is a "Shape"?
You typically save your shapes by creating a JavaScript "shape" object representing each shape.
var myCircle = { x:30, y:20, radius:15 };
Of course, you're not really saving shapes. Instead, you're saving the definition of how to draw the shapes.
Then put...
This function will take 2 datetime parameters, the DOB, and a date to check the age at
CREATE FUNCTION [dbo].[Calc_Age]
(
@DOB datetime , @calcDate datetime
)
RETURNS int
AS
BEGIN
declare @age int
IF (@calcDate < @DOB )
RETURN -1
-- If a DOB is supplied a...
Create a custom BitmapImageViewTarget to load the image into:
public class CircularBitmapImageViewTarget extends BitmapImageViewTarget
{
private Context context;
private ImageView imageView;
public CircularBitmapImageViewTarget(Context context, ImageView imageView)
{
...
Implicit intents do not name a specific component, but instead declare a general action to perform, which allows a component from another app to handle it.
For example, if you want to show the user a location on a map, you can use an implicit intent to request that another capable app show a specif...
As the characters/digits can be anywhere within the string, we require lookaheads. Lookaheads are of zero width meaning they do not consume any string. In simple words the position of checking resets to the original position after each condition of lookahead is met.
Assumption :- Considering non-wo...
By default, LESS will use its own calc() unless told otherwise. So:
@column-count: 2;
.class-example {
width: calc(100% / @column-count);
}
Would compile to this:
.class-example {
width: 50%;
}
While it is our desired width, LESS has used it's own calc() function to calculate ...
