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TypeScript function overloading
...Script, you only have one implementation with multiple signatures.
class Foo {
myMethod(a: string);
myMethod(a: number);
myMethod(a: number, b: string);
myMethod(a: any, b?: string) {
alert(a.toString());
}
}
Only the three overloads are recognized by TypeScript as po...
Select all elements with “data-” attribute without using jQuery
...ct all DOM elements that have a certain data- attribute (let's say data-foo ). The elements may be different tag elements.
...
Should I use a class or dictionary?
...
@Ralf A class Foo is merely a type, like int and string. Do you store value in an integer type or variable foo of integer type? Subtle, but important semantic difference. In languages like C this distinction is not too relevant outside of ...
uppercase first character in a variable with bash
...
foo="$(tr '[:lower:]' '[:upper:]' <<< ${foo:0:1})${foo:1}"
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Why does (“foo” === new String(“foo”)) evaluate to false in JavaScript?
...
"foo" is a string primitive. (this concept does not exist in C# or Java)
new String("foo") is boxed string object.
The === operator behaves differently on primitives and objects.
When comparing primitives (of the same type)...
How to get started with developing Internet Explorer extensions?
...rface(ClassInterfaceType.None)]
[Guid("D40C654D-7C51-4EB3-95B2-1E23905C2A2D")]
[ProgId("MyBHO.WordHighlighter")]
public class WordHighlighterBHO : IObjectWithSite, IOleCommandTarget
{
const string DefaultTextToHighlight = "browser";
IWebBrowser2 browser;
priv...
Is Java “pass-by-reference” or “pass-by-value”?
...Dog = new Dog("Max");
Dog oldDog = aDog;
// we pass the object to foo
foo(aDog);
// aDog variable is still pointing to the "Max" dog when foo(...) returns
aDog.getName().equals("Max"); // true
aDog.getName().equals("Fifi"); // false
aDog == oldDog; // true
}
public stat...
How to sort an array in descending order in Ruby
...everse way will reverse the order of keys that are equal.
Example:
a = [{foo: 1, bar: 1},{foo: 2,bar: 1}]
a.sort_by {|h| -h[:bar]}
=> [{:foo=>1, :bar=>1}, {:foo=>2, :bar=>1}]
a.sort_by {|h| h[:bar]}.reverse
=> [{:foo=>2, :bar=>1}, {:foo=>1, :bar=>1}]
While you oft...
Java optional parameters
... ways to simulate optional parameters in Java:
Method overloading.
void foo(String a, Integer b) {
//...
}
void foo(String a) {
foo(a, 0); // here, 0 is a default value for b
}
foo("a", 2);
foo("a");
One of the limitations of this approach is that it doesn't work if you have two optio...
Is a `=default` move constructor equivalent to a member-wise move constructor?
...copy will be used for both members: http://coliru.stacked-crooked.com/a/171fd0ce335327cd - prints:
movable::copy
nonmovable::copy
So probably putting =default everywhere still makes sense. It doesn't mean that your move expressions will always move, but it makes chances of this higher.
One more ...