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What's invokedynamic and how do I use it?
I keep hearing about all the new cool features that are being added to the JVM and one of those cool features is invokedynamic. I would like to know what it is and how does it make reflective programming in Java easier or better?
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How to handle Objective-C protocols that contain properties?
...answered May 10 '09 at 5:46
Kendall Helmstetter GelnerKendall Helmstetter Gelner
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Thou shalt not inherit from std::vector
Ok, this is really difficult to confess, but I do have a strong temptation at the moment to inherit from std::vector .
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What is the difference between pluck and collect in Rails?
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When you do:
User.first.gifts.collect(&:id)
You have objects with all fields loaded and you simply get the id thanks to the method based on Enumerable.
So:
if you only need the id with Rails 4, use ids: User.first.gifts.ids
if you only need some fields with Rails 4, use pluck: User.first...
How to get maximum value from the Collection (for example ArrayList)?
...f the given collection, according to the natural ordering of its elements. All elements in the collection must implement the Comparable interface.
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Is JavaScript a pass-by-reference or pass-by-value language?
...oduces the output:
10
changed
unchanged
If obj1 was not a reference at all, then changing obj1.item would have no effect on the obj1 outside of the function.
If the argument was a proper reference, then everything would have changed. num would be 100, and obj2.item would read "changed".
Instea...
When should I use a struct instead of a class?
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MSDN has the answer:
Choosing Between Classes and Structures.
Basically, that page gives you a 4-item checklist and says to use a class unless your type meets all of the criteria.
Do not define a structure unless the
type has all of the following
characteristics:
It logica...
Error:(1, 0) Plugin with id 'com.android.application' not found
This is my first attempt at Android Studio. I installed 0.8.0 and updated to 0.8.2. As soon as a project is created I get the error message:
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Flexbox not giving equal width to elements
...t has up to 5 items and as little as 3, but it's not dividing the width equally between all the elements.
2 Answers
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Why doesn't Ruby support i++ or i-- (increment/decrement operators)?
...ct the variable references with a whole new object. You can check this by calling i.object_id before and after i+=1. Why would that be any more technically tricky to do with ++?
– Andy_Vulhop
Sep 7 '10 at 17:09
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