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Abandoning changes without deleting from history

...rst time you push this closed head to another repository since you are actually create additional heads in the remote repository when you push. So tell Mercurial that this is okay with --force. People who pull the closed head wont be bothered by any warnings. ...
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Clearing NSUserDefaults

...e time studying the Apple documentation and resetStandardUserDefaults basically flushes the in-memory buffer to disk and wipes it clean. So the next time you try to retrieve a value it has to grab it from disk. Core Data's NSManagedObjectContext also uses similar "reset" terminology. ...
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How should I ethically approach user password storage for later plaintext retrieval?

...hat the user can retrieve the password, then strictly speaking you don't really need to retrieve the password they set (they don't remember what it is anyway), you need to be able to give them a password they can use. Think about it: if the user needs to retrieve the password, it's because they've...
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Common CSS Media Queries Break Points [duplicate]

...re practical to base them on your particular layout instead. That is, gradually narrow your desktop browser window and observe the natural breakpoints for your content. It's different for every site. As long as the design flows well at each browser width, it should work pretty reliably on any scree...
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Why use AJAX when WebSockets is available?

...s opens up new application domains to browser applications that were not really possible using HTTP and AJAX (interactive games, dynamic media streams, bridging to existing network protocols, etc). However, there is certainly an overlap in purpose between WebSockets and AJAX/Comet. For example, whe...
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In C++, is it still bad practice to return a vector from a function?

...o says nothing about v-tables, so you can't be sure that virtual function calls are efficient either. Essentially, you need to put some faith in the compiler at times. – Peter Alexander Jun 28 '10 at 23:04 ...
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Where to place JavaScript in an HTML file?

...ts. Of course Levi's comment "just before you need it and no sooner" is really the correct answer, i.e. "it depends". share | improve this answer | follow | ...
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BaseException.message deprecated in Python 2.6

...of the exception hierarchy. Provides an 'args' attribute that contains all arguments passed to the constructor. Suggested practice, though, is that only a single string argument be passed to the constructor.""" __str__ and __repr__ are already implemented in a meaningful way, especiall...
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How to Display blob (.pdf) in an AngularJS app

... First of all you need to set the responseType to arraybuffer. This is required if you want to create a blob of your data. See Sending_and_Receiving_Binary_Data. So your code will look like this: $http.post('/postUrlHere',{myParams}, ...
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What is the difference between Flex/Lex and Yacc/Bison?

...itimate copies of (the original, AT&T versions of) Lex and Yacc to install on Ubuntu. I wouldn't necessarily say it is impossible, but I'm not aware of such. Flex and Bison are readily available and are equivalent for most purposes. You may also find various alternative and approximately equi...