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How do I dynamically assign properties to an object in TypeScript?
...tring,
[key: string]: any
}
var obj: MyType ;
obj = { requiredProp1: "foo"}; // valid
obj = {} // error. 'requiredProp1' is missing
obj.typesafeProp1 = "bar" // error. typesafeProp1 should be a number
obj.prop = "value";
obj.prop2 = 88;
Record<Keys,Type> utility type
Update (August 20...
JAX-RS — How to return JSON and HTTP status code together?
...here is how to set the response code to CREATED when appropriate.
@Path("/foos/{fooId}")
@PUT
@Consumes("application/json")
@Produces("application/json")
public Foo setFoo(@PathParam("fooID") final String fooID, final Foo foo, @Context final HttpServletResponse response)
{
//TODO store foo in per...
What is the most pythonic way to check if an object is a number?
...Using isNumber thusly will give the following output:
class A: pass
def foo(): return 1
for x in [1,1.4, A(), range(10), foo, foo()]:
answer = isNumber(x)
print('{answer} == isNumber({x})'.format(**locals()))
Output:
True == isNumber(1)
True == isNumber(1.4)
False == isNumber(<__ma...
get and set in TypeScript
...
TypeScript uses getter/setter syntax that is like ActionScript3.
class foo {
private _bar: boolean = false;
get bar(): boolean {
return this._bar;
}
set bar(value: boolean) {
this._bar = value;
}
}
That will produce this JavaScript, using the ECMAScript 5 Ob...
How to find the 'sizeof' (a pointer pointing to an array)?
... getSize(T (&)[SIZE]) {
return SIZE;
}
Here is an example with a foo_t structure:
#include <cstddef>
template<typename T, size_t SIZE>
size_t getSize(T (&)[SIZE]) {
return SIZE;
}
struct foo_t {
int ball;
};
int main()
{
foo_t foos3[] = {{1},{2},{3}};
fo...
Insert line after first match using sed
...
Try doing this using GNU sed:
sed '/CLIENTSCRIPT="foo"/a CLIENTSCRIPT2="hello"' file
if you want to substitute in-place, use
sed -i '/CLIENTSCRIPT="foo"/a CLIENTSCRIPT2="hello"' file
Output
CLIENTSCRIPT="foo"
CLIENTSCRIPT2="hello"
CLIENTFILE="bar"
Doc
see sed doc a...
New self vs. new static
...uated at compile time and must not depend on run-time information.
class Foo {
public $name = static::class;
}
$Foo = new Foo;
echo $Foo->name; // Fatal error
Using self::
class Foo {
public $name = self::class;
}
$Foo = new Foo;
echo $Foo->name; // Foo
Please note that ...
How to set a default value for a datetime column to record creation time in a migration?
...
You can add a function in a model like this:
before_create :set_foo_to_now
def set_foo_to_now
self.foo = Time.now
end
So that the model will set the current time in the model.
You can also place some sql code in the migration for setting the default value at the database level,...
Passing a String by Reference in Java?
...ew StringBuilder ();
void fillString(StringBuilder zText) { zText.append ("foo"); }
Create a container class and pass an instance of the container to your method:
public class Container { public String data; }
void fillString(Container c) { c.data += "foo"; }
Create an array:
new String[] zText ...
Is there a performance difference between i++ and ++i in C++?
...e of the operator++ functions. Here's a standard pair of these functions:
Foo& Foo::operator++() // called for ++i
{
this->data += 1;
return *this;
}
Foo Foo::operator++(int ignored_dummy_value) // called for i++
{
Foo tmp(*this); // variable "tmp" cannot be optimized away...