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Why malloc+memset is slower than calloc?
...example, if you allocate 16 bytes, malloc() will first try to get 16 bytes out of one of its pools, and then ask for more memory from the kernel when the pool runs dry. However, since the program you're asking about is allocating for a large amount of memory at once, malloc() and calloc() will just...
When to favor ng-if vs. ng-show/ng-hide?
...t it from another perspective: I'd always use ng-if and get those elements out of DOM, unless:
you for some reason need the data-bindings and $watch-es on your elements to remain active while they're invisible. Forms might be a good case for this, if you want to be able to check validity on input...
Why we should not use protected static in java
...haven't properly thought through what is going on with the class.
Think about what static means:
This variable exists at class level, it does not exist separately for each instance and it does not have an independent existence in classes which extend me.
Think about what protected means:
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How to check “hasRole” in Java Code with Spring Security?
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What about ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest() to get the request? :)
– Petr Újezdský
Apr 19 '16 at 12:37
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Keyboard shortcut to comment lines in Sublime Text 3
In Sublime Text 2 it was possible to comment out a line or a block of lines with Ctrl + / and Ctrl + Shift + / . According to the menu Edit > Comment these shortcuts should be valid, but in Sublime Text 3 (build 3047) they no longer seem to work. Does anybody know the right default keyboard...
How do I pull my project from github?
... a project on github that I have been working on before. However, I wiped out my computer and I am wondering which git command should I invoke under my username to checkout my project again so that I can push my latest changes to github under my account.
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Spring Boot application as a Service
... If you want to monitor process and restart it if it die without writing system daemons check out patrickgrimard.com/2014/06/06/…
– ruX
Feb 26 '16 at 21:41
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“elseif” syntax in JavaScript
...ow it's identical, but I wonder what javascript's reason is for leaving it out. I am glad, however, that they didn't use elif, because that's just wrong :)
– Jay K
Aug 6 '12 at 22:39
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Can't find Request.GetOwinContext
I have been searching for an hour trying to figure out why this isn't working.
13 Answers
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Smooth GPS data
...some work I did on Android devices.
General Kalman filter theory is all about estimates for vectors, with the accuracy of the estimates represented by covariance matrices. However, for estimating location on Android devices the general theory reduces to a very simple case. Android location provi...