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Function overloading by return type?
...unc(); # prints "scalar"
(Note: I may sometimes say Perl operator when I mean function. This is not crucial to this discussion.)
Haskell takes the other approach, namely to not have side effects. It also has a strong type system, and so you can write code like the following:
main = do n <- ...
android image button
...d whatever you want and set the icon as the src.
<ImageButton
android:id="@+id/ImageButton01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/album_icon"
android:background="@drawable/round_button" />
...
How do you detect where two line segments intersect? [closed]
...tting
(p + t r) × s = (q + u s) × s
And since s × s = 0, this means
t (r × s) = (q − p) × s
And therefore, solving for t:
t = (q − p) × s / (r × s)
In the same way, we can solve for u:
(p + t r) × r = (q + u s) × r
u (s × r) = (p − q) × r
u = ...
HTML form readonly SELECT tag/input
...
You should keep the select element disabled but also add another hidden input with the same name and value.
If you reenable your SELECT, you should copy its value to the hidden input in an onchange event and disable (or remove) the hidden input.
Here is a demo:
$('#mainform').submit(...
How do I detect unsigned integer multiply overflow?
...003 3.9.1.4). My use of 'overflow' in the question was the more colloquial meaning, intended to include the well-defined wrapping of unsigned types, since I was interested in unsigned ints representing mathematical positive integers, not positive integers mod 2^32 (or 2^64). The distinction between ...
How does type Dynamic work and how to use it?
... not possible to create the methods that should be called at runtime. This means that we can't do something like
val name = "foo"
d.$name
where d.$name would be transformed to d.foo at runtime. But this is not that bad because even in dynamic languages this is a dangerous feature.
Another thing ...
SQL UPDATE all values in a field with appended string CONCAT not working
...s pretty much all you need:
mysql> select * from t;
+------+-------+
| id | data |
+------+-------+
| 1 | max |
| 2 | linda |
| 3 | sam |
| 4 | henry |
+------+-------+
4 rows in set (0.02 sec)
mysql> update t set data=concat(data, 'a');
Query OK, 4 rows affected (0.01 sec...
GetHashCode Guidelines in C#
...
Since a.Equals(b) must mean that a.GetHashCode() == b.GetHashCode(), the hash code most often has to change if data used for equality comparison is changed. I'd say that the problem is not GetHashCode being based on mutable data. The problem is usi...
How do I toggle an element's class in pure JavaScript?
...'.menu') // Using a class instead, see note below.
menu.classList.toggle('hidden-phone');
As an aside, you shouldn't be using IDs (they leak globals into the JS window object).
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Cast List to List
...
@RobertNoack: What do you mean by "the object reference"? The object reference of each element is the same, but that's not the same as casting the list reference itself. Suppose you could cast the reference, so that you had a reference of compile-time...