A DTD can contain entity declarations.
<?xml version="1.0"?>
<!DOCTYPE document [
<!ENTITY my-entity "This is the replacement text">
]>
<document>
<!-- the rest of the document -->
</document>
Entities are described in details in ...
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+)
>>...
A variable declared constexpr is implicitly const and its value may be used as a constant expression.
Comparison with #define
A constexpr is type-safe replacement for #define based compile-time expressions. With constexpr the compile-time evaluated expression is replaced with the result. For examp...
Ada is a programming language for which there exists multiple compilers.
One of these compilers, and perhaps the most used, is GNAT. It is part of the GCC toolchain. It can be installed from several sources:
The yearly GPL release done by AdaCore, available for free on libre site. This ver...
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...
A method can take an array parameter and destructure it immediately into named local variables. Found on Mathias Meyer's blog.
def feed( amount, (animal, food) )
p "#{amount} #{animal}s chew some #{food}"
end
feed 3, [ 'rabbit', 'grass' ] # => "3 rabbits chew some gra...
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 ...
Bean1
@ManagedBean
@ViewScoped
public class Bean1 implements Serializable {
/**
* Just takes the given param, sets it into flash context and redirects to
* page2
*
* @param inputValue
* @return
*/
public String goPage2(String inputValue) {
...
Sometimes you might accidentally run something in the shell that ends up waiting forever, and thus blocking the shell:
iex(2)> receive do _ -> :stuck end
In that case, press Ctrl-g. You'll see:
User switch command
Enter these commands in order:
k (to kill the shell process)
s (to st...
