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What is the Java ?: operator called and what does it do?
I have been working with Java a couple of years, but up until recently I haven't run across this construct:
16 Answers
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What does 'const static' mean in C and C++?
...saw this in some code here on StackOverflow and I couldn't figure out what it does. Then I saw some confused answers on other forums. My best guess is that it's used in C to hide the constant foo from other modules. Is this correct? If so, why would anyone use it in a C++ context where you can jus...
What are the benefits of learning Vim? [closed]
As a programmer I spend a lot of hours at the keyboard and I've been doing it for the last 12 years, more or less. If there's something I've never gotten used to during all this time, it's these annoying and almost unconscious constant micro-interruptions I experience while coding, due to some of th...
Why is it bad practice to call System.gc()?
...ow to force-free objects in Java (the guy was clearing a 1.5GB HashMap) with System.gc() , I was told it's bad practice to call System.gc() manually, but the comments were not entirely convincing. In addition, no one seemed to dare to upvote, nor downvote my answer.
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What is a 'Closure'?
...on about Currying and closures were mentioned.
What is a closure? How does it relate to currying?
23 Answers
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What's so bad about Template Haskell?
It seems that Template Haskell is often viewed by the Haskell community as an unfortunate convenience. It's hard to put into words exactly what I have observed in this regard, but consider these few examples
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How do I write a bash script to restart a process if it dies?
...python script that'll be checking a queue and performing an action on each item:
8 Answers
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What is duck typing?
...reading random topics on software online and did not completely understand it.
13 Answers
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UnboundLocalError on local variable when reassigned after first use
...s to them from inside or outside the function. If a variable is assigned within a function, it is treated by default as a local variable. Therefore, when you uncomment the line you are trying to reference the local variable c before any value has been assigned to it.
If you want the variable c to...
C++ - passing references to std::shared_ptr or boost::shared_ptr
If I have a function that needs to work with a shared_ptr , wouldn't it be more efficient to pass it a reference to it (so to avoid copying the shared_ptr object)?
What are the possible bad side effects?
I envision two possible cases:
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