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MySQL case insensitive select
...ELECT query is case sensitive or case insensitive by default? And if not, what query would I have to send so that I can do something like:
...
Array.Copy vs Buffer.BlockCopy
...ereas Copy is the general-purpose implementation. My question is - under what circumstances should you use BlockCopy ? Should you use it at any time when you are copying primitive type arrays, or should you only use it if you're coding for performance? Is there anything inherently dangerous about...
NSObject +load and +initialize - What do they do?
...s
+ (void)initialize {
if (self == [Someclass class]) {
// do whatever
}
}
The point of this pattern is to avoid Someclass re-initializing itself when it has a subclass that doesn't implement initialize.
The runtime sends the initialize message in the _class_initialize function i...
Why use sprintf function in PHP?
...can translate and order them as needed - yet you still know that no matter what format the string is in - you wish to show the users name.
For example, your site will say "Welcome back [[User]]" on the top of the page. As the programmer you don't know or care how the UI guys are going to write that...
REST API - why use PUT DELETE POST GET?
...of data. When you see a request in REST, it should immediately be apparant what is happening with the data.
For example:
GET: /cars/make/chevrolet
is likely going to return a list of chevy cars. A good REST api might even incorporate some output options in the querystring like ?output=json or ?o...
How to delete from a text file, all lines that contain a specific string?
...
I'm curious what the performance difference would be if it were sed '/pattern/d' filename > filename2; mv filename2 filename
– Pete
Apr 8 '14 at 1:00
...
Can we have functions inside functions in C++?
...
No.
What are you trying to do?
workaround:
int main(void)
{
struct foo
{
void operator()() { int a = 1; }
};
foo b;
b(); // call the operator()
}
...
Image Segmentation using Mean Shift explained
...tual numbers, we will display a color coding, so it's easier to understand what is happening:
The color coding for your matrix is:
Then we take a reasonable Mean Shift:
MeanShiftFilter[a, 3, 3]
And we get:
Where all center elements are equal (to 97, BTW).
You may iterate several...
find() with nil when there are no records
...
Why don't you simply catch the exception? Your case looks exactly like what exceptions were made for:
begin
user = User.find(10)
rescue ActiveRecord::RecordNotFound
puts "some error msg"
end
If you want to recover from the error in the rescue block (e.g. by setting a placeholder user (nul...
Live character count for EditText
I was wondering what the best way to do a live character count of an edit-text box is in Android. I was looking at this but I couldn't seem to make any sense of it.
...