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Working with select using AngularJS's ng-options
...of the array item the option tag relates to. This is because AngularJS actually allows you to select entire objects with select controls, and not just primitive types. For example:
app.controller('MainCtrl', function($scope) {
$scope.items = [
{ id: 1, name: 'foo' },
{ id: 2, name: 'ba...
Calling Java varargs method with single null argument?
If I have a vararg Java method foo(Object ...arg) and I call foo(null, null) , I have both arg[0] and arg[1] as null s. But if I call foo(null) , arg itself is null. Why is this happening?
...
C++ deprecated conversion from string constant to 'char*'
...you are doing somewhere (not in the code you posted) something like:
void foo(char* str);
foo("hello");
The problem is that you are trying to convert a string literal (with type const char[]) to char*.
You can convert a const char[] to const char* because the array decays to the pointer, but wha...
Java's final vs. C++'s const
...on const instances. Java does not have an equivalent to this. E.g.:
class Foo {
public:
void bar();
void foo() const;
};
void test(const Foo& i) {
i.foo(); //fine
i.bar(); //error
}
Values can be assigned, once, later in Java only e.g.:
public class Foo {
void bar() {
...
How to execute a MySQL command from a shell script?
... type it in here>
ERROR 1049 (42000): Unknown database 'XXXXXXXX'
Actually, I prefer to store the user and password in ~/.my.cnf so I don't have to put it on the command-line at all:
[client]
user = root
password = XXXXXXXX
Then:
$ mysql -h "server-name" "database-name" < "filename.sql"
...
Scala constructor overload?
...at the primary constructor is the sole point of entry to the class.
class Foo(x: Int, y: Int, z: String) {
// default y parameter to 0
def this(x: Int, z: String) = this(x, 0, z)
// default x & y parameters to 0
// calls previous auxiliary constructor which calls the primary cons...
Constructor function vs Factory functions
...function is used with the new keyword (which causes JavaScript to automatically create a new object, set this within the function to that object, and return the object):
var objFromConstructor = new ConstructorFunction();
A factory function is called like a "regular" function:
var objFromFactory...
NodeJS: How to get the server's port?
...uire('express')();
server.get('/', function(req, res) {
res.send("Hello Foo!");
});
var listener = server.listen(3000);
console.log('Your friendly Express server, listening on port %s', listener.address().port);
// Your friendly Express server, listening on port 3000
Again, this is tested in E...
How can I use Guzzle to send a POST request in JSON?
...se = $client->post('url', [
GuzzleHttp\RequestOptions::JSON => ['foo' => 'bar'] // or 'json' => [...]
]);
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Correct way to detach from a container without stopping it
...aseimage-docker/#intro)
If you want a container that run in detached mode all the time, i suggest you use
docker run -d foo
With an ssh server on the container. (easiest way is to follow the dockerizing openssh tutorial https://docs.docker.com/engine/examples/running_ssh_service/)
Or you can ju...