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How to map and remove nil values in Ruby
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Ruby 2.7+
There is now!
Ruby 2.7 is introducing filter_map for this exact purpose. It's idiomatic and performant, and I'd expect it to become the norm very soon.
For example:
numbers = [1, 2, 5, 8, 10, 13]
enum.filter_map { |i| i * 2 if i.even? }
# => [4, ...
What is the purpose of mock objects?
I am new to unit testing, and I continously hear the words 'mock objects' thrown around a lot. In layman's terms, can someone explain what mock objects are, and what they are typically used for when writing unit tests?
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What is the use of a private static variable in Java?
... ClassName.varName . I am also aware that static members are shared by all instances of a class and are not reallocated in each instance.
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Python memory leaks [closed]
I have a long-running script which, if let to run long enough, will consume all the memory on my system.
9 Answers
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Search stops working for “Entire Solution”
Somehow Visual Studio search has stopped working for me. Anytime I search "Entire Solution" for some text I get this result:
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What is the difference between ManualResetEvent and AutoResetEvent in .NET?
I have read the documentation on this and I think I understand. An AutoResetEvent resets when the code passes through event.WaitOne() , but a ManualResetEvent does not.
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Xcode 4: How do you view the console?
I can't seem to find a way to have the console run (to show NSLog comments) in XCode 4. The normal method for the previous version of XCode does not work. Does anyone have an idea of how to accomplish this?
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In Android, how do I set margins in dp programmatically?
In this , this and this thread I tried to find an answer on how to set the margins on a single view. However, I was wondering if there isn't an easier way. I'll explain why I rather wouldn't want to use this approach:
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How to change highlighted occurrences color in Eclipse's sidebar?
When you have "Mark occurrences" enabled in Eclipse, placing the cursor on any type/variable/method/etc will highlight all occurrences in the text editor and place a faint bar in the right ruler to show you the location of other occurrences in the file.
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Is there a destructor for Java?
Is there a destructor for Java? I don't seem to be able to find any documentation on this. If there isn't, how can I achieve the same effect?
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