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explicit casting from super class to subclass
... you're essentially telling the compiler "trust me. I'm a professional, I know what I'm doing and I know that although you can't guarantee it, I'm telling you that this animal variable is definitely going to be a dog."
Since the animal isn't actually a dog (it's an animal, you could do Animal anima...
Is std::vector so much slower than plain arrays?
...d::vector<Pixel> pixels(dimensions * dimensions, Pixel(255,0,0));
Now doing the same timing again:
g++ -O3 Time.cpp -I <MyBoost>
./a.out
UseVector completed in 2.216 seconds
The vector now performance only slightly worse than the array. IMO this difference is insignificant...
Hidden features of Eclipse [closed]
...y = new |
and then I pushed Ctrl-Space to complete the constructor call. Now I type:
new Display()|
and press Ctrl-2 L, which results in:
Display display = new Display()|
This really speeds things up. (Ctrl-2 F does the same, but assigns to a new field rather than a new variable.)
Another g...
Java Programming - Where should SQL statements be stored? [closed]
...tch from DB server without the need to change your model (but ask yourself now: how often would a company switch from DB server? likely at least only once per 3 years, isn't it?).
I won't call stored procedures a "good" solution for this. They have an entirely different purpose. Even though, your c...
How does the Brainfuck Hello World actually work?
...memory looks like:
...[0][0][*97*][0][0]...
If you use dot (.) operator now, what BF does is print:
a
Because a decimal code in ASCII is 97.
So for example BF program like this (97 pluses 2 dots):
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++...
Can you build dynamic libraries for iOS and load them at runtime?
...
Anybody know why that is? To me it just seems completely insane.
– Erik de Castro Lopo
Apr 29 '11 at 3:24
74
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When restoring a backup, how do I disconnect all active connections?
...nd select 'Activity Monitor'.
When this opens, expand the Processes group.
Now use the drop-down to filter the results by database name.
Kill off the server connections by selecting the right-click 'Kill Process' option.
sh...
Editing screenshots in iTunes Connect after iOS app was approved
...
Apple support now got back with the (somehow not too satisfactory) answer:
If your app is currently for sale on
the App Store, you will need to submit
an update in order to change your app
screenshots.
If you have any furthe...
Converting timestamp to time ago in PHP e.g 1 day ago, 2 days ago…
...
Function :
function time_elapsed_string($datetime, $full = false) {
$now = new DateTime;
$ago = new DateTime($datetime);
$diff = $now->diff($ago);
$diff->w = floor($diff->d / 7);
$diff->d -= $diff->w * 7;
$string = array(
'y' => 'year',
'...
Browser doesn't scale below 400px?
...to the right instead of to the bottom
Resize the inspector panel - you can now make the browser area really small (down to 0px)
Update: Chrome now allows you to arrange the inspector windows vertically when docked to the right! This really improves the layout.
The HTML and CSS panels fit really...