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Using smart pointers for class members
I'm having trouble understanding the usage of smart pointers as class members in C++11. I have read a lot about smart pointers and I think I do understand how unique_ptr and shared_ptr / weak_ptr work in general. What I don't understand is the real usage. It seems like everybody recommends using...
JUnit test for System.out.println()
...ld appear to be the simplest mechanism.
(I would advocate, at some stage, convert the app to some logging framework - but I suspect you already are aware of this!)
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How to drop a PostgreSQL database if there are active connections to it?
...he pid values you want to kill, then issue SELECT pg_terminate_backend(pid int) to them.
PostgreSQL 9.2 and above:
SELECT pg_terminate_backend(pg_stat_activity.pid)
FROM pg_stat_activity
WHERE pg_stat_activity.datname = 'TARGET_DB' -- ← change this to your DB
AND pid <> pg_backend_pid();...
What are the uses of “using” in C#?
... and Using objects that implement IDisposable (microsoft), the C# compiler converts
using (MyResource myRes = new MyResource())
{
myRes.DoSomething();
}
to
{ // Limits scope of myRes
MyResource myRes= new MyResource();
try
{
myRes.DoSomething();
}
finally
{
...
Why is Java's boolean primitive size not defined?
..., but due to
alignment rules it may consume much
more. IMHO it is more interesting to
know that a boolean[] will consume one
byte per entry and not one bit,plus
some overhead due to alignment and for
the size field of the array. There are
graph algorithms where large fields of
bits a...
What is the difference between decodeURIComponent and decodeURI?
...
encodeURIComponent()
Converts the input into a URL-encoded
string
encodeURI()
URL-encodes the input, but
assumes a full URL is given, so
returns a valid URL by not encoding
the protocol (e.g. http://) and
host name (e.g.
ww...
How to create an array from a CSV file using PHP and the fgetcsv function
...
I have created a function which will convert a csv string to an array. The function knows how to escape special characters, and it works with or without enclosure chars.
$dataArray = csvstring_to_array( file_get_contents('Address.csv'));
I tried it with your ...
How to use base class's constructors and assignment operator in C++?
...erator=(const Base&) { /*...*/ }
};
class Derived : public Base
{
int additional_;
public:
Derived(const Derived& d)
: Base(d) // dispatch to base copy constructor
, additional_(d.additional_)
{
}
Derived& operator=(const Derived& d)
{
...
Programmatically register a broadcast receiver
...kageManager.html#setComponentEnabledSetting(android.content.ComponentName, int, int)
Note if you are only interested in receiving a broadcast while you are running, it is better to use registerReceiver(). A receiver component is primarily useful for when you need to make sure your app is launched ...
Adding HTML entities using CSS content
...on the hexadecimal value of a character.
I found that the easiest way to convert symbol to their hexadecimal equivalent is, such as from ▾ (&#9662;) to \25BE is to use the Microsoft calculator =)
Yes. Enable programmers mode, turn on the decimal system, enter 9662, then switch to hex and yo...