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Matching a space in regex
...X is the physical tab character (and each is preceded by a single space in all those examples).
These will work in every* regex engine I've ever seen (some of which don't even have the one-or-more "+" character, ugh).
If you know you'll be using one of the more modern regex engines, "\s" and its v...
to drawRect or not to drawRect (when should one use drawRect/Core Graphics vs subviews/images and wh
...bviews whenever you can. You can be more productive, and take advantage of all the OO mechanisms that should things easier to maintain. Use Core Graphics when you can't get the performance you need out of UIKit, or you know trying to hack together drawing effects in UIKit would be more complicated....
Why use @PostConstruct?
In a managed bean, @PostConstruct is called after the regular Java object constructor.
5 Answers
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Git: Discard all changes on a diverged local branch
...tting the branch, on the other hand not only preserves the reflog, but actually records the reset in the reflog. This makes the operation easily reversible later, if needed.
– Dan Moulding
Mar 30 '11 at 22:36
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Why should I use IHttpActionResult instead of HttpResponseMessage?
...which your controller should inherit from, and therefore is just a method call. So no new keyword is needed there. You probably aren't inheriting from ApiController or you are inside a static method. ResponseMessageResult is the return type of ResponseMessage().
– AaronLS
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Difference between malloc and calloc?
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calloc() gives you a zero-initialized buffer, while malloc() leaves the memory uninitialized.
For large allocations, most calloc implementations under mainstream OSes will get known-zeroed pages from the OS (e.g. via POSIX mm...
Archives not showing up in Organizer for Xcode 4
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EDIT (Incorporated all comments to a single answer)
Try one of the following (or all)
Instead of using Build For -> Archive, in the product menu just use archive. It will show up then.
In the scheme editor, edit the scheme and go to the A...
How can I calculate an md5 checksum of a directory?
I need to calculate a summary md5 checksum for all files of a particular type ( *.py for example) placed under a directory and all sub-directories.
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Update Git branches from master
...his approach. When I run git log --graph, the graph show the master is actually merged to the topic branch. Will this cause any problem in the long run? I thought the best practice is always merge the topic branch back to master. Please comment.
– Patrick
Nov 1...
Using getopts to process long and short command line options
...or using the bash builtin getopts to mimic long options. That solution actually makes a short option whose character is "-". So you get "--" as the flag. Then anything following that becomes OPTARG, and you test the OPTARG with a nested case.
This is clever, but it comes with caveats:
getopts ca...