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What is 'Currying'?
...argument to map must be a function that takes only 1 argument - an element from the list. Multiplication - as a mathematical concept - is a binary operation; it takes 2 arguments. However, in Haskell * is a curried function, similar to the second version of add in this answer. The result of (* 5) is...
Getting image dimensions without reading the entire file
...of the given format and the value being a function which extracts the size from the stream. Most formats are simple enough, the only real stinker is jpeg.
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Why are arrays of references illegal?
... @AaronMcDaid I think the real reason - which is so conspicuously absent from this & similar discussions - is that if one had an array of references, how would one possibly disambiguate between the address of an element & the address of its referent? The immediate objection to 'You can't p...
How to change Hash values?
...ndefined behavior - this is valid in other languages also. Here's a reply from Matz (he replies to an example using an Array, but the answer is generic): j.mp/tPOh2U
– Marcus
Dec 6 '11 at 15:01
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Resize Google Maps marker icon image
...cts. The Icon object literal was added
in 3.10, and replaces MarkerImage from version 3.11 onwards. Icon
object literals support the same parameters as MarkerImage, allowing
you to easily convert a MarkerImage to an Icon by removing the
constructor, wrapping the previous parameters in {}'s, ...
How to adjust text font size to fit textview
...lator and phones but not very well on Eclipse layout editor. It's inspired from kilaka's code but the size of the text is not obtained from the Paint but from measuring the TextView itself calling measure(0, 0).
The Java class :
public class FontFitTextView extends TextView
{
private static fi...
不同品牌的防火墙组成高可靠性集群 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...级，编号越小优先级越高。例如如下路由规则：
0: from all lookup local
32766: from all lookup main
32767: from all lookup default
优先级最高的规则是0，要查询的路由表名称是local，其次是32766，要查询的路由表名称是main，后面...
Choosing Java vs Python on Google App Engine
... code in the user's browser, Java's GWT (generating the Javascript for you from your Java-level coding) is far richer and more advanced than Python-side alternatives (in practice, if you choose Python, you'll be writing some JS yourself for this purpose, while if you choose Java GWT is a usable alte...
Reference — What does this symbol mean in PHP?
...to display the current number of apples, and then you want to subtract one from it.
You can also increment letters in PHP:
$i = "a";
while ($i < "c") {
echo $i++;
}
Once z is reached aa is next, and so on.
Note that character variables can be incremented but not decremented and even s...
Get PHP class property by string
...untable, and one of the iterator interfaces, it's mostly indistinguishable from a normal array()
– Peter Bailey
May 13 '15 at 13:06
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