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Convert string to nullable type (int, double, etc…)
... return null;
}
Then call it like this...
void doStuff()
{
string foo = "1.0";
double? myDouble = foo.ToNullablePrimitive<double>(double.TryParse);
foo = "1";
int? myInt = foo.ToNullablePrimitive<int>(int.TryParse);
foo = "haha";
int? myInt2 = foo.ToNull...
When to use “new” and when not to, in C++? [duplicate]
...l be destroyed when it goes out of scope. Some examples of this are:
void foo()
{
Point p = Point(0,0);
} // p is now destroyed.
for (...)
{
Point p = Point(0,0);
} // p is destroyed after each loop
Some people will say that the use of new decides whether your object is on the heap or the st...
How can I create an object based on an interface file definition in TypeScript?
...odal>{}. It removes an ambiguity in the language grammar when using <foo> style assertions in JSX. Read more. And of course, use let or const instead of var.
– Alex Klaus
Oct 2 '18 at 7:55
...
Can I list-initialize a vector of move-only type?
...riadic arguments:
#include <vector>
#include <memory>
struct Foo
{
std::unique_ptr<int> u;
int x;
Foo(int x = 0): x(x) {}
};
template<typename V> // recursion-ender
void multi_emplace(std::vector<V> &vec) {}
template<typename V, typename T1...
Why do Java programmers like to name a variable “clazz”? [closed]
...d hide any pre-existing identifiers which differed only in casing. Having Foo defined at class scope and foo at local-variable scope should be legal, but all references to the class-scope variable within the scope of the local should require this.Foo. Such a rule would...
– s...
How to add display:inline-block in a jQuery show() function?
...d work. Maybe you are targeting the wrong element on your HTML page.
$('#foo').css('display', 'inline-block');
But if you are not using any effects of .show(), .hide() why don't you set those CSS properties manually like:
$('#foo').css('display','none');
$('#foo').css('display','inline-block')...
What's the strangest corner case you've seen in C# or .NET? [closed]
...e original code was obviously more complex and subtle...)
static void Foo<T>() where T : new()
{
T t = new T();
Console.WriteLine(t.ToString()); // works fine
Console.WriteLine(t.GetHashCode()); // works fine
Console.WriteLine(t.Equals(t)); // works fin...
SQL command to display history of queries
I would like to display my executed sql command history in my MYSQL Query Browser. What is the sql statement for displaying history?
...
What is “thread local storage” in Python, and why do I need it?
...ocal
data = local()
def bar():
print("I'm called from", data.v)
def foo():
bar()
class T(Thread):
def run(self):
sleep(random())
data.v = self.getName() # Thread-1 and Thread-2 accordingly
sleep(1)
foo()
>> T().start(); T().start()
I'm calle...
How to use dashes in HTML-5 data-* attributes in ASP.NET MVC
...core.
For example:
@Html.TextBoxFor(vm => vm.City, new { data_bind = "foo" })
will render this in MVC 3:
<input data-bind="foo" id="City" name="City" type="text" value="" />
If you're still using an older version of MVC, you can mimic what MVC 3 is doing by creating this static metho...