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Switch on Enum in Java [duplicate]
...nd would make for some convenient code. Also this question could apply to String 's. You can switch on a char , but not a String ...?
...
Pointer arithmetic for void pointer in C
When a pointer to a particular type (say int , char , float , ..) is incremented, its value is increased by the size of that data type. If a void pointer which points to data of size x is incremented, how does it get to point x bytes ahead? How does the compiler know to add x to value of ...
How to achieve code folding effects in Emacs?
...er way to skin the cat:
As it happens, you don’t need any package or extra configuration for
that. Just go to any source file, type
M-1 C-x $ and magic happens!
As usual, it’s white magic: C-x $ will bring your code back.
We can use Emacs’ help system to discover what’s going o...
Get/pick an image from Android's built-in Gallery app programmatically
...r own action
private static final int SELECT_PICTURE = 1;
private String selectedImagePath;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViewById(R.id.Button01)
.setOnCl...
(grep) Regex to match non-ASCII characters?
...
[^\x00-\x7F] and [^[:ascii:]] miss some control bytes so strings can be the better option sometimes. For example cat test.torrent | perl -pe 's/[^[:ascii:]]+/\n/g' will do odd things to your terminal, where as strings test.torrent will behave.
...
Is SQL or even TSQL Turing Complete?
...'t modify a database.
-- Brain Fuck interpreter in SQL
DECLARE @Code VARCHAR(MAX) = ', [>,] < [.<]'
DECLARE @Input VARCHAR(MAX) = '!dlroW olleH';
-- Creates a "BrainFuck" DataBase.
-- CREATE DATABASE BrainFuck;
-- Creates the Source code table
DECLARE @CodeTable TABLE (
[Id] I...
Use space as a delimiter with cut command
...pplications to specify the option and option-argument in the same argument string without intervening characters.
In other words: In this case, because -d's option-argument is mandatory, you can choose whether to specify the delimiter as:
(s) EITHER: a separate argument
(d) OR: as a value dire...
Read error response body in Java
...nges for encoding or other things. Works in current environment.)
private String dispatch(HttpURLConnection http) throws Exception {
try {
return readStream(http.getInputStream());
} catch(Exception ex) {
readAndThrowError(http);
return null; // <- never gets here...
What does “dereferencing” a pointer mean?
...his way C encodes text in memory is known as ASCIIZ.
For example, if the string literal happened to be at address 0x1000 and p a 32-bit pointer at 0x2000, the memory content would be:
Memory Address (hex) Variable name Contents
1000 'a' == 97 (ASCII)
1001...
Typedef function pointer?
...he original type, for instance
typedef int myinteger;
typedef char *mystring;
typedef void (*myfunc)();
using them like
myinteger i; // is equivalent to int i;
mystring s; // is the same as char *s;
myfunc f; // compile equally as void (*f)();
As you can see, you...