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Concurrent vs serial queues in GCD
I'm struggling to fully understand the concurrent and serial queues in GCD. I have some issues and hoping someone can answer me clearly and at the point.
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How would you make a comma-separated string from a list of strings?
What would be your preferred way to concatenate strings from a sequence such that between every two consecutive pairs a comma is added. That is, how do you map, for instance, ['a', 'b', 'c'] to 'a,b,c' ? (The cases ['s'] and [] should be mapped to 's' and '' , respectively.)
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How to remove a key from a Python dictionary?
When deleting a key from a dictionary, I use:
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c++11 Return value optimization or move? [duplicate]
...s will already allow the use of the move constructor, if one is available. In fact, a local variable can bind to an rvalue reference in a return statement precisely when copy elision is allowed.
Your second version actively prohibits copy elision. The first version is universally better.
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Is it possible to target older iOS versions when using Xcode 4.2 and iOS 5 SDK?
...ely noticed that I am unable to use my iPhone 3Gs with iOS 4.2.1 for debugging. I am only able to debug and test on my iphone 4 with iOS 5 installed.
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What is the use of the %n format specifier in C?
What is the use of the %n format specifier in C? Could anyone explain with an example?
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How to use unicode characters in Windows command line?
We have a project in Team Foundation Server (TFS) that has a non-English character (š) in it. When trying to script a few build-related things we've stumbled upon a problem - we can't pass the š letter to the command-line tools. The command prompt or what not else messes it up, and the tf.exe ...
Thou shalt not inherit from std::vector
...y difficult to confess, but I do have a strong temptation at the moment to inherit from std::vector .
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How can I import Swift code to Objective-C?
I have written a library in Swift and I wasn't able to import it to my current project, written in Objective-C.
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Declaring an unsigned int in Java
Is there a way to declare an unsigned int in Java?
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