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What are the rules about using an underscore in a C++ identifier?
...n C++11):
Reserved in any scope, including for use as implementation macros:
identifiers beginning with an underscore followed immediately by an uppercase letter
identifiers containing adjacent underscores (or "double underscore")
Reserved in the global namespace:
identifiers beginning with a...
Escape double quotes in parameter
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Windows: the OS where globbing, shell expansion, and parameter unescaping is performed by the executable being invoked instead of the shell. You never know which convention, if any, the invoked executable honours.
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How to make an Android Spinner with initial text “Select One”?
... overrides the Spinner view. It overrides setAdapter() to set the initial position to -1, and proxies the supplied SpinnerAdapter to display the prompt string for position less than 0.
This has been tested on Android 1.5 through 4.2, but buyer beware! Because this solution relies on reflection to c...
How can I profile Python code line-by-line?
... decorator I wrote: gist.github.com/kylegibson/6583590. If you're running nosetests, be sure to use the -s option so stdout is printed immediately.
– Kyle Gibson
Sep 16 '13 at 17:14
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What's the difference between the atomic and nonatomic attributes?
...ead B calls the setter, an actual viable value -- an autoreleased object, most likely -- will be returned to the caller in A.
In nonatomic, no such guarantees are made. Thus, nonatomic is considerably faster than "atomic".
What "atomic" does not do is make any guarantees about thread safety. If...
Difference between std::system_clock and std::steady_clock?
...n the standard where that is the case? It seems to clearly indicate the opposite.
– Billy ONeal
Sep 9 '15 at 18:56
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Scheduling recurring task in Android
...od completes. If your alarm receiver called Context.startService(), it is possible that the phone will sleep before the requested service is launched. To prevent this, your BroadcastReceiver and Service will need to implement a separate wake lock policy to ensure that the phone continues running unt...
Weak and strong property setter attributes in Objective-C
...give best answers here!!
Variable property attributes or Modifiers in iOS
01.strong (iOS4 = retain )
- it says "keep this in the heap until I don't point to it anymore"
- in other words " I'am the owner, you cannot dealloc this before aim fine with that same as retain"
- You use st...
What are the details of “Objective-C Literals” mentioned in the Xcode 4.4 release notes?
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Copied verbatim from http://cocoaheads.tumblr.com/post/17757846453/objective-c-literals-for-nsdictionary-nsarray-and:
Objective-C literals: one can now create literals for NSArray, NSDictionary, and NSNumber (just like one can create literals for NSString)
NSArray Literals
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Can scrapy be used to scrape dynamic content from websites that are using AJAX?
...hand into building a web-scraper. It's nothing fancy at all; its only purpose is to get the data off of a betting website and have this data put into Excel.
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