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@property retain, assign, copy, nonatomic in Objective-C
... atomic one.
@property (nonatomic)NSString *name;
retain is required when the attribute is a pointer to an object.
The setter method will increase retain count of the object, so that it will occupy memory in autorelease pool.
@property (retain)NSString *name;
copy If you use copy,...
Tags for Emacs: Relationship between etags, ebrowse, cscope, GNU Global and exuberant ctags
I work on C++ projects, and I went through Alex Ott's guide to CEDET and other threads about tags in StackOverflow, but I am still confused about how Emacs interfaces with these different tag systems to facilitate autocompletion, the looking up of definitions, navigation of source code base or the...
I need to securely store a username and password in Python, what are my options?
...
+1, that makes a lot of sense. I could always build a UI for it which essentially asks the user for his password on boot, that way it's never stored on disk and is safe from prying eyes.
– Naftuli Kay
Aug 10 '11 at 19:07
...
Android Fatal signal 11 (SIGSEGV) at 0x636f7d89 (code=1). How can it be tracked down?
...ke this:
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
Build fingerprint: 'XXXXXXXXX'
pid: 1658, tid: 13086 >>> system_server <<<
signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 64696f7e
r0 00000000 r1 00000001 r2 ad12d1e8 r3 7373654d
r4 64696f72 r5 ...
Why should I avoid using Properties in C#?
...t - I find properties make the client code much simpler to read than the equivalent method calls. I agree that developers need to know that properties are basically methods in disguise - but I think that educating developers about that is better than making code harder to read using methods. (In par...
Is there a MySQL option/feature to track history of changes to records?
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It's subtle.
If the business requirement is "I want to audit the changes to the data - who did what and when?", you can usually use audit tables (as per the trigger example Keethanjan posted). I'm not a huge fan of triggers, but it has the great benefit of ...
Git for beginners: The definitive practical guide
...(the name of the directory to be created):
git init project002
(This is equivalent to: mkdir project002 && cd project002 && git init)
To check if the current current path is within a git repository, simply run git status - if it's not a repository, it will report "fatal: Not a git ...
Rotated elements in CSS that affect their parent's height correctly
...ven for non-text elements - but like many interesting things in CSS, it requires a little cunning. My solution also technically invokes undefined behaviour according to the CSS 2 spec - so while I've tested and confirmed that it works in Chrome, Firefox, Safari, and Edge, I can't promise you that it...
How to write WinForms code that auto-scales to system font and dpi settings?
...ut there know better, we'd love to hear from you. (Please don't bother arguing we should switch to WPF... that's not an option right now.)
...
What is the correct way to create a single-instance WPF application?
...bed by the article is advantageous for two reasons.
First, it does not require a dependency on the Microsoft.VisualBasic assembly. If my project already had a dependency on that assembly, I would probably advocate using the approach shown in another answer. But as it is, I do not use the Microsof...