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Is Using .NET 4.0 Tuples in my C# Code a Poor Design Decision?
...pport for tuples in C#:
private var GetDesserts()
{
return _icecreams.Select(
i => new { icecream = i, topping = new Topping(i) }
);
}
public void Eat()
{
foreach (var dessert in GetDesserts())
{
dessert.icecream.AddTopping(dessert.topping);
dessert.Eat()...
How to develop a soft keyboard for Android? [closed]
... is showing in setting option with built in keyboard, but in actual when i select my custom keyboard to replace inbuilt keyboard my app in crashing. Do you have any idea where i am going wrong?
– Aniket
Oct 10 '13 at 9:39
...
How are multi-dimensional arrays formatted in memory?
...
unsigned char MultiArray[5][2]={{0,1},{2,3},{4,5},{6,7},{8,9}};
in memory is equal to:
unsigned char SingleArray[10]={0,1,2,3,4,5,6,7,8,9};
share
...
Hidden features of C
...
Multi-character constants:
int x = 'ABCD';
This sets x to 0x41424344 (or 0x44434241, depending on architecture).
EDIT: This technique is not portable, especially if you serialize the int.
However, it can be extremely useful to ...
Difference between >>> and >>
...as really refering to (imho), is that a String could also be regarded as a char[]. He's not saying that a char is not a number ; he's just saying that it's an unsigned number. I think that's where he's lost.
– bvdb
Aug 17 '15 at 10:33
...
When should I use Struct vs. OpenStruct?
....new(:data1, :data2)
n = Newtype.new
C:
typedef struct {
int data1;
char data2;
} newtype;
newtype n;
The OpenStruct class can be compared to an anonymous struct declaration in C. It allows the programmer to create an instance of a complex type.
Ruby:
o = OpenStruct.new(data1: 0, data2:...
What is a good Hash Function?
... that differ only in the last 4 bytes can collide easily. If you have a 30 character string, that differ in the last 4 bytes, after 28 bytes have been processes, the hashes differ only in the last 2 bytes. That means you are GUARANTEED a collision for one of the remaining two-byte values. (Yeah, it'...
Implement touch using Python?
...'atime', c_timespec), ('mtime', c_timespec)]
utimens = CFUNCTYPE(c_int, c_char_p, POINTER(c_utimbuf))
futimens = CFUNCTYPE(c_int, c_char_p, POINTER(c_utimbuf))
# from /usr/include/i386-linux-gnu/bits/stat.h
UTIME_NOW = ((1l << 30) - 1l)
UTIME_OMIT = ((1l << 30) - 2l)
now = c_timespe...
What are the underlying data structures used for Redis?
...m-ish unique users") or with replacement ("give me 7 cards, but after each selection, put the card back so it can potentially be sampled again").
For all possible operations on sets, see the sets docs.
Sorted Sets
Redis sorted sets are sets with a user-defined ordering.
For simplicity, you can think...
Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
...n multiple courses, books, and jobs, I have seen text fields defined as VARCHAR(255) as kind of the default for "shortish" text. Is there any good reason that a length of 255 is chosen so often, other than being a nice round number ? Is it a holdout from some time in the past when there was a goo...