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Difference of keywords 'typename' and 'class' in templates?
...in the basic case of specifying a template:
template<class T>
class Foo
{
};
and
template<typename T>
class Foo
{
};
are equivalent.
Having said that, there are specific cases where there is a difference between typename and class.
The first one is in the case of dependent types....
Interface type check with Typescript
...: any): object is A {
return 'member' in object;
}
var a:any={member:"foobar"};
if (instanceOfA(a)) {
alert(a.member);
}
Lots of Members
If you need to check a lot of members to determine whether an object matches your type, you could instead add a discriminator. The below is the most b...
Returning unique_ptr from functions
...
@juanchopanza Do you essentially mean that foo() is indeed also about to be destroyed (if it were not assigned to anything), just like the return value within the function, and hence it makes sense that C++ uses a move constructor when doing unique_ptr<int> p = ...
How to create file execute mode permissions in Git on Windows?
...file and mark it executable in a single commit:
C:\Temp\TestRepo>touch foo.sh
C:\Temp\TestRepo>git add foo.sh
C:\Temp\TestRepo>git ls-files --stage
100644 e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 0 foo.sh
As you note, after adding, the mode is 0644 (ie, not executable). However,...
How to inherit constructors?
...constructors?? That's your main problem. How about this instead?
public Foo(params int[] list) {...}
share
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Can a local variable's memory be accessed outside its scope?
.... The entire hotel could be just about to be torn down and replaced with a football stadium, and you are going to die in an explosion while you are sneaking around.
You don't know what is going to happen; when you checked out of the hotel and stole a key to illegally use later, you gave up the rig...
What is attr_accessor in Ruby?
...d. What it does is create more methods for you.
So this code here:
class Foo
attr_accessor :bar
end
is equivalent to this code:
class Foo
def bar
@bar
end
def bar=( new_value )
@bar = new_value
end
end
You can write this sort of method yourself in Ruby:
class Module
def v...
Initialization of an ArrayList in one line
...or later, after List.of() was added:
List<String> strings = List.of("foo", "bar", "baz");
With Java 10 or later, this can be shortened with the var keyword.
var strings = List.of("foo", "bar", "baz");
This will give you an immutable List, so it cannot be changed.
Which is what you want in mo...
How do you specify that a class property is an integer?
...ntiate our properties even at runtime
// they are still just numbers
class Foo {
someId: ID;
someInt: Int;
}
let foo = new Foo();
// compiler won't let you do this due to or markers
foo.someId = 2;
foo.someInt = 1;
// when assigning, you have to cast to the specific type
// NOTE: This is ...
How to rename with prefix/suffix?
... This is the best answer so far.
– lifeisfoo
Jan 5 '16 at 14:51
I don't think you need the first $ in this...