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What are bitwise shift (bit-shift) operators and how do they work?
..., you would use the following math:
memoryOffset = (row * 320) + column
Now, back in that day and age, speed was critical, so we would use bitshifts to do this operation.
However, 320 is not a power of two, so to get around this we have to find out what is a power of two that added together make...
Type Checking: typeof, GetType, or is?
...foo = (Foo)obj;
requires two.
Update (Jan 2020):
As of C# 7+, you can now cast inline, so the 'is' approach can now be done in one cast as well.
Example:
if(obj is Foo newLocalFoo)
{
// For example, you can now reference 'newLocalFoo' in this local scope
Console.WriteLine(newLocalFoo...
Which would be better for concurrent tasks on node.js? Fibers? Web-workers? or Threads?
...wers to solve the problem: Fibers, Webworkers and Threads (thread-a-gogo). Now which one to use is a confusion and one of them definitely needs to be used - afterall what's the purpose of having a server which is just good at IO and nothing else? Suggestions needed!
...
Forward declaring an enum in C++
...
The reason the enum can't be forward declared is that without knowing the values, the compiler can't know the storage required for the enum variable. C++ Compiler's are allowed to specify the actual storage space based on the size necessary to contain all the values specified. If all t...
How to prune local tracking branches that do not exist on remote anymore
...ll have local refs (not actual branches yet) called origin/A and origin/B. Now let's say I do the following:
git checkout -b A origin/A
git checkout -b Z origin/B
git checkout -b C <some hash>
The pertinent facts here are that I for some reason chose to create a branch on my local repo that...
How can a web application send push notifications to iOS devices? [closed]
...ort push notifications.
UPDATE:
Mac OS X 10.9 & Safari 7 websites can now also send push notifications, but this still does not apply to iOS.
Read the Notification Programming Guide for Websites. Also check out WWDC 2013 Session 614.
...
How are POST and GET variables handled in Python?
...
I know this is an old question. Yet it's surprising that no good answer was given.
First of all the question is completely valid without mentioning the framework. The CONTEXT is a PHP language equivalence. Although there are ma...
How often should you use git-gc?
...hurt to run it more frequently than needed, though.
What I'd do is run it now, then a week from now take a measurement of disk utilization, run it again, and measure disk utilization again. If it drops 5% in size, then run it once a week. If it drops more, then run it more frequently. If it drop...
How to explain Katana and OWIN in simple words and uses?
...atures that IIS provides, you'd go for IIS but you'd lose on performance.
Now, there is a 3rd option, a Microsoft library named Helios (current codename) which intends to remove System.Web out of the way, and allow you to use IIS on more "cleaner" way, without any unnecessary libraries or modules. ...
What would cause an algorithm to have O(log n) complexity?
My knowledge of big-O is limited, and when log terms show up in the equation it throws me off even more.
6 Answers
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