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Mod of negative number is melting my brain
...don't think this is accurate and I don't see why a modulo is any different from remainder. That's what it also says on the Modulo Operation Wikipedia page. It's just that programming languages treat negative numbers differently. The modulo operator in C# obviously counts remainders "from" zero (-9%4...
Getting error: Peer authentication failed for user “postgres”, when trying to get pgsql working with
...cation method works by obtaining the client's
operating system user name from the kernel and using it as the allowed
database user name (with optional user name mapping). This method is
only supported on local connections.
Password authentication
The password-based authentication methods...
How to prevent UINavigationBar from covering top of view in iOS 7?
...igationController.navigationBar.translucent = NO;
This will fix the view from being framed underneath the navigation bar and status bar.
If you have to show and hide the navigation bar, then use
if ([self respondsToSelector:@selector(edgesForExtendedLayout)])
self.edgesForExtendedLayout = U...
How to read/write a boolean when implementing the Parcelable interface?
...e((byte) (myBoolean ? 1 : 0)); //if myBoolean == true, byte == 1
readFromParcel:
myBoolean = in.readByte() != 0; //myBoolean == true if byte != 0
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What is the difference between require and require-dev sections in composer.json?
...ke more sense to commit everything, and for deploy just pull master branch from production using git?
– mbomb007
Apr 17 at 16:16
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How do I break out of a loop in Scala?
....control.Breaks using syntax that looks a lot like your familiar old break from C/Java:
import scala.util.control.Breaks._
var sum = 0
breakable { for (i <- 0 to 1000) {
sum += i
if (sum >= 1000) break
} }
(3) Put the code into a method and use return.
var sum = 0
def findSum { for (i ...
Why does Ruby have both private and protected methods?
... the defining class or its subclasses.
private methods can be called only from within the calling object. You cannot access another instance's private methods directly.
Here is a quick practical example:
def compare_to(x)
self.some_method <=> x.some_method
end
some_method cannot be priv...
Benchmarking (python vs. c++ using BLAS) and (numpy)
...k on our new HPC.
Both the hardware as well as the software stack changed from the setup in the original answer.
I put the results in a google spreadsheet (contains also the results from the original answer).
Hardware
Our HPC has two different nodes one with Intel Sandy Bridge CPUs and one with ...
Which $_SERVER variables are safe?
...ues that the user controls and you need to be aware of where a value comes from and hence whether it can be trusted for a certain purpose. $_SERVER['HTTP_FOOBAR'] for example is entirely safe to store in a database, but I most certainly wouldn't eval it.
As such, let's divide those values into thre...
Convert Time from one time zone to another in Rails
My created_at timestamps are stored in UTC:
5 Answers
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