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Is there a way to create a function from a string with javascript?
...
Dynamic function names in JavaScript
Using Function
var name = "foo";
// Implement it
var func = new Function("return function " + name + "(){ alert('hi there!'); };")();
// Test it
func();
// Next is TRUE
func.name === 'foo'
Source: http://marcosc.com/2012/03/dynamic-function-names-in-...
Why do I need to override the equals and hashCode methods in Java?
...hcode, like HashMap and Set. Let's say we have a class like:
public class Foo {
String id;
String whatevs;
Foo(String id, String whatevs) {
this.id = id;
this.whatevs = whatevs;
}
}
We create two instances with the same id:
Foo a = new Foo("id", "something");
Foo...
What is Type-safe?
...s, Trying to put an integer in a string
String one = 1;
// Also fails.
int foo = "bar";
This also applies to method arguments, since you are passing explicit types to them:
int AddTwoNumbers(int a, int b)
{
return a + b;
}
If I tried to call that using:
int Sum = AddTwoNumbers(5, "5");
T...
Command line to remove an environment variable from the OS level configuration
...o remove the variable from the current environment (not permanently):
set FOOBAR=
To permanently remove the variable from the user environment (which is the default place setx puts it):
REG delete HKCU\Environment /F /V FOOBAR
If the variable is set in the system environment (e.g. if you origi...
Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
...rator += when applied to those hashes work as expected.
[1] pry(main)> foo = Hash.new( [] )
=> {}
[2] pry(main)> foo[1]+=[1]
=> [1]
[3] pry(main)> foo[2]+=[2]
=> [2]
[4] pry(main)> foo
=> {1=>[1], 2=>[2]}
[5] pry(main)> bar = Hash.new { [] }
=> {}
[6] pry(main)&g...
Remove all classes that begin with a certain string
... that does wildcard class removal.
Will optionally add classes too.
$( '#foo' ).alterClass( 'foo-* bar-*', 'foobar' )
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Mercurial — revert back to old version and continue from there
..., then you can keep them private. It's very simple: with hg clone --rev 38 foo foo-38 you will get a new local clone that only contains up to revision 38. You can continue working in foo-38 and push the new (good) changesets you create. You'll still have the old (bad) revisions in your foo clone. (Y...
What does the construct x = x || y mean?
...
If title is not set, use 'ERROR' as default value.
More generic:
var foobar = foo || default;
Reads: Set foobar to foo or default.
You could even chain this up many times:
var foobar = foo || bar || something || 42;
...
How do I best silence a warning about unused variables?
... compiler sees it is used. This is portable between compilers.
E.g.
void foo(int param1, int param2)
{
(void)param2;
bar(param1);
}
Or,
#define UNUSED(expr) do { (void)(expr); } while (0)
...
void foo(int param1, int param2)
{
UNUSED(param2);
bar(param1);
}
...
throw checked Exceptions from mocks with Mockito
...xception extends Exception {
// this is a checked exception
}
interface Foo {
Bar frob() throws BarException
}
it's legal to write:
Foo foo = mock(Foo.class);
when(foo.frob()).thenThrow(BarException.class)
However, if you throw a checked exception not declared in the method signature, e.g....