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How to call a parent method from child class in javascript?
...u are using ES6 classes syntax. As a very simple example, checkout:
class Foo {
static classMethod() {
return 'hello';
}
}
class Bar extends Foo {
static classMethod() {
return super.classMethod() + ', too';
}
}
Bar.classMethod(); // 'hello, too'
Also, you can use...
Are the days of passing const std::string & as a parameter over?
...r, it also depends on what you use.
Lets consider next functions :
bool foo1( const std::string v )
{
return v.empty();
}
bool foo2( const std::string & v )
{
return v.empty();
}
These functions are implemented in a separate compilation unit in order to avoid inlining. Then :
1. If you ...
Why can a function modify some arguments as perceived by the caller, but not others?
...s make sense if you want to provide optional output destination as in: def foo(x, l=None): l=l or []; l.append(x**2); return l[-1].
– Janusz Lenar
Aug 31 '12 at 13:03
...
What is the Scala identifier “implicitly”?
... a type parameter A that requires an implicit parameter of type M[A]:
def foo[A](implicit ma: M[A])
can be rewritten as:
def foo[A: M]
But what's the point of passing the implicit parameter but not naming it? How can this be useful when implementing the method foo?
Often, the implicit paramet...
Display name of the current file in vim?
...%m%r%h%w [%Y] [0x%02.2B]%< %F%=%4v,%4l %3p%% of %L"
Which produces:
foo.c [C] [0x23]<code/foo.c 1, 1 2% of 50
Also, as someone mentioned (but now deleted) % will be replaced with the current filename. For example:
:!echo "current file: %"
current file: foo.c
Press ENTER or type c...
Why do this() and super() have to be the first statement in a constructor?
...ic methods. What I wanted to do looked something like this:
public class Foo extends Baz {
private final Bar myBar;
public Foo(String arg1, String arg2) {
// ...
// ... Some other stuff needed to construct a 'Bar'...
// ...
final Bar b = new Bar(arg1, arg2);
super(b.baz())...
How do you print in a Go test using the “testing” package?
... issue 24929
Consider the following (silly) automated tests:
func TestFoo(t *testing.T) {
t.Parallel()
for i := 0; i < 15; i++ {
t.Logf("%d", i)
time.Sleep(3 * time.Second)
}
}
func TestBar(t *testing.T) {
t.Parallel()
for i := 0; i < 15; i++ {
t...
What is the logic behind the “using” keyword in C++?
...n-deducible context. That is, it will not be possible to
call the function foo below without explicitly specifying template
arguments.
template <typename T> void foo (Vec<T>::type&);
So, the syntax is somewhat ugly. We would rather avoid the nested ::type
We’d prefer something lik...
Pass a local file in to URL in Java
...and then lists the host (generally omitted), followed by "/" and the path "foo/bar" (generally meant to be read as an absolute path). Thus "file:///foo/var". An URI that looks like "file:/foo/bar" is incorrect. See also: file URI scheme
– David Tonhofer
Sep 2 '...
Qt: *.pro vs *.pri
...l .pro files as the need arises. This is how you would use it in practice:
foo.pri
FOO = BAR
hello.pro
...
include($$PWD/foo.pri)
...
world.pro
...
include($$PWD/foo.pri)
...
This way, the commonality would be available both in hello.pro as well as world.pro. It does not make much of difference i...