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What is the difference between buffer and cache memory in Linux?
...p understand:
Buffer is for storing file metadata (permissions, location, etc). Every memory page is kept track of here.
Cache is for storing actual file contents.
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When should you branch?
...t also depends on the SCM tool you are using. Modern SCMs (git, mercurial, etc.) make it increasingly easy to create and destroy branches whenever needed. This allows you to, for example, make one branch per bug that you are working on. Once you merge your results into the trunk, you discard the bra...
Is there a cross-browser onload event when clicking the back button?
...e the problem. My javascript was set to execute after all of the libraries etc. were loaded. I checked these with the readyStateChange event.
After some testing I found out that the readyState of an element in a page where back has been clicked is not 'loaded' but 'complete'. Adding || element.read...
What's the difference between @Secured and @PreAuthorize in spring security 3?
...on-based" and you can use expressions like hasRole, hasAnyRole, permitAll, etc.
To learn about expressions, see these example expressions.
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What's the difference between CENTER_INSIDE and FIT_CENTER scale types?
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Note that center/centerInside, etc. don't actually centre the image, as far as I can tell. At least in the case when the image is smaller than the view. I could be wrong.
– Timmmm
Nov 21 '12 at 17:39
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Get name of current script in Python
...his will print foo.py for python foo.py, dir/foo.py for python dir/foo.py, etc. It's the first argument to python. (Note that after py2exe it would be foo.exe.)
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@import vs #import - iOS 7
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Modules are pre-built for most Apple frameworks (UIKit, MapKit, GameKit, etc). You can use them with frameworks you create yourself: they are created automatically if you create a Swift framework in Xcode, and you can manually create a ".modulemap" file yourself for any Apple or 3rd-party library....
Best practice to return errors in ASP.NET Web API
...m back as most exceptions are usually due to incorrect parameters or calls etc.
An example in my app is that sometimes the client will ask for data, but there isn't any data available so I throw a custom NoDataAvailableException and let it bubble to the Web API app, where then in my custom filter w...
DateTime.Now vs. DateTime.UtcNow
...one they live in.
We also display relative times (2 hours ago, 1 day ago, etc) until the post ages enough that the time is "the same" no matter where on Earth you live.
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Difference between TCP and UDP?
... never used to send important data such as webpages, database information, etc; UDP is commonly used for streaming audio and video. Streaming media such as Windows Media audio files (.WMA) , Real Player (.RM), and others use UDP because it offers speed! The reason UDP is faster than TCP is because t...