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How to add extension methods to Enums
...lic class Enum<T> where T : struct, IConvertible
{
public static int Count
{
get
{
if (!typeof(T).IsEnum)
throw new ArgumentException("T must be an enumerated type");
return Enum.GetNames(typeof(T)).Length;
}
}
}
Yo...
Is it possible to use raw SQL within a Spring Repository
...e(name = "USER_INFO_TEST")
public class UserInfoTest {
private int id;
private String name;
private String rollNo;
public UserInfoTest() {
}
public UserInfoTest(int id, String name) {
this.id = id;
this.name = name;
}
...
Storing C++ template function definitions in a .CPP file
... via the approach you describe above.
I recommend reading the following points from the C++ FAQ Lite:
Why can’t I separate the definition of my templates class from its declaration and put it inside a .cpp file?
How can I avoid linker errors with my template functions?
How does the C++ keyword...
Select rows of a matrix that meet a condition
...
This is easier to do if you convert your matrix to a data frame using as.data.frame(). In that case the previous answers (using subset or m$three) will work, otherwise they will not.
To perform the operation on a matrix, you can define a column by nam...
How can I check if my python object is a number? [duplicate]
... @AlexKahn In Python, booleans are practically numbers: bool inherits from int, abs(True) == 1, "foo" * False == "", sum([True, False, True]) == 2, "%f" % True == "1.0", and so on.
– user395760
Nov 24 '15 at 22:12
...
How can I change the color of AlertDialog title and the color of the line under it
...fortunately, unlike with the ListSeparator's style, AlertDialog themes are internal, and therefore cannot be referenced as parent styles. There is no easy way to change that little blue line! Thus you need to resort to making custom dialogs.
If that just isn't your cup of tea... don't give up! I wa...
How do I get the current GPS location programmatically in Android?
...);
if (addresses.size() > 0) {
System.out.println(addresses.get(0).getLocality());
cityName = addresses.get(0).getLocality();
}
}
catch (IOException e) {
e.printStackTrace();
}
String s = longitude...
Why does Node.js' fs.readFile() return a buffer instead of string?
...
It is returning a Buffer object.
If you want it in a string, you can convert it with data.toString():
var fs = require("fs");
fs.readFile("test.txt", function (err, data) {
if (err) throw err;
console.log(data.toString());
});
...
Measuring the distance between two coordinates in PHP
... $longitudeFrom, $latitudeTo, $longitudeTo, $earthRadius = 6371000)
{
// convert from degrees to radians
$latFrom = deg2rad($latitudeFrom);
$lonFrom = deg2rad($longitudeFrom);
$latTo = deg2rad($latitudeTo);
$lonTo = deg2rad($longitudeTo);
$latDelta = $latTo - $latFrom;
$lonDelta = $lo...
Why are unnamed namespaces used and what are their benefits?
...tive, being able to even make a type translation unit local.
namespace { int a1; }
static int a2;
Both a's are translation unit local and won't clash at link time. But the difference is that the a1 in the anonymous namespace gets a unique name.
Read the excellent article at comeau-computing Why...