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Difference between core and processor
...ic computation unit of the CPU - it can run a single program context (or multiple ones if it supports hardware threads such as hyperthreading on Intel CPUs), maintaining the correct program state, registers, and correct execution order, and performing the operations through ALUs. For optimization pu...
Codesign error: Certificate identity appearing twice
...d a few certificates to sign the app.
Quick Fix:
Open up KEYCHAIN ACCESS > click on MY CERTIFICATES> in there you will probably see
iPhone Developer: . You will probably see it TWICE!
Select the one with the earliest Expiration date, right click and select DELETE.
Restart Xcode if you have...
Converting an object to a string
...
var foo = {bar: 1}; String(foo); -> "[object Object]"
– Anti Veeranna
May 3 '16 at 6:56
1
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log4net vs. Nlog
...sophisticated things. We want a quality solution, but frankly don't need ultra high performance or 60 types of event sinks.
All 3 have very similar basic concepts.
Each has its own cool tricks, like really advanced routing, or dynamic log filenames, file truncating, etc.
All 3 are pretty well docum...
How did I get a value larger than 8 bits in size from an 8-bit integer?
...ng a char shouldn't ever be undefined behavior as long as sizeof(char) < sizeof(int) . But that doesn't explain how c is getting an impossible value. As an 8-bit integer, how can c hold values greater than its bit-width?
...
Good introduction to the .NET Reactive Framework [closed]
...oint(mv.X, mv.Y);
mouseMoveWhileDown
.Pairwise()
.Subscribe(tup => graphics.DrawLine(pen, tup.Item1, tup.Item2));
(I must confess that in that example, Pairwise() is home-grown...)
The most important thing about IObservable is that it is 'composable', just like IEnumerable.
I thouro...
View markdown files offline [closed]
...s.
After install, enable "Allow access to file URLs" in Extensions (menu > More tools > Extensions or enter URL chrome://extensions/ instead).
Then drag-n-drop a Markdown file onto Chrome and use your favorite editor to edit.
...
How to prove that a problem is NP complete?
...that X is in SAT if and only if Y is in your problem. The function f : X -> Y must run in polynomial time.
In the example above, the input Y would be the graph G and the size of the vertex cover k.
For a full proof, you'd have to prove both:
that X is in SAT => Y in your problem
and Y in you...
In Windows cmd, how do I prompt for user input and use the result in another command?
...h file like jstack %id%.
For example:
set /P id=Enter id:
jstack %id% > jstack.txt
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How to encrypt/decrypt data in php?
...able random number generator. The following example would be recommended (>= 5.3):
$key_size = 32; // 256 bits
$encryption_key = openssl_random_pseudo_bytes($key_size, $strong);
// $strong will be true if the key is crypto safe
This can be done once or multiple times (if you wish to create a c...