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Do NSUserDefaults persist through an Update to an app in the Appstore?
...such as preferences, dates, strings etc. If you are looking to save images and files, the file system is a better bet.
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What's the difference between “declare class” and “interface” in TypeScript
...eScript, when creating .d.ts source declaration files, which is preferable and why?
4 Answers
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How do I tell if a regular file does not exist in Bash?
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The test command ([ here) has a "not" logical operator which is the exclamation point (similar to many other languages). Try this:
if [ ! -f /tmp/foo.txt ]; then
echo "File not found!"
fi
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Is there a difference between foo(void) and foo() in C++ or C?
...void), therefore, we achieve the same interpretation across both languages and make our headers multilingual (though we usually need to do some more things to the headers to make them truly cross-language; namely, wrap them in an extern "C" if we're compiling C++).
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Margin while printing html page
... am using a separate style-sheet for printing. Is it possible to set right and left margin in the style-sheet which set the print margin (i.e. margin on paper).
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Is there a simple way to remove unused dependencies from a maven pom.xml?
I have a large Maven project with many modules and many pom.xml files. The project has changed and I suspect the pom's contain some unnecessary dependencies. Is there is a command which removes any unused dependencies from a pom?
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Xcode can only refactor C and Objective-C code. How to rename swift class name in Xcode 6?
...hen I select Refactor -> Rename, it gives error Xcode can only refactor C and Objective-C code .
6 Answers
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Checking whether a variable is an integer or not [duplicate]
...orphism: you should allow any object that behaves like an int, instead of mandating that it be one.
BUT
The classical Python mentality, though, is that it's easier to ask forgiveness than permission. In other words, don't check whether x is an integer; assume that it is and catch the exception resul...
What's the best way to develop a sideswipe menu like the one in Facebook's new iOS app?
...ed into each iPhone app. Facebook has included it in their latest version and the new Gmail app appears to include it as well . I was wondering if anybody had thoughts on the most efficient way of developing something like this as it's becoming a more common interface element. While I have my o...
How to initialise memory with new operator in C++?
I'm just beginning to get into C++ and I want to pick up some good habits. If I have just allocated an array of type int with the new operator, how can I initialise them all to 0 without looping through them all myself? Should I just use memset ? Is there a “C++” way to do it?
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