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Polymorphism: Why use “List list = new ArrayList” instead of “ArrayList list = new ArrayList”? [dupl
...e like this:
List list = new ArrayList();
the rest of your code only knows that data is of type List, which is preferable because it allows you to switch between different implementations of the List interface with ease.
For instance, say you were writing a fairly large 3rd party library, and ...
Best JavaScript compressor [closed]
...tter than YUI on all scripts I tested it on, and it's safer than Closure (knows to deal with "eval" or "with").
Other than whitespace removal, UglifyJS also does the following:
changes local variable names (usually to single characters)
joins consecutive var declarations
avoids inserting any unne...
How do I check if a variable exists?
I want to check if a variable exists. Now I'm doing something like this:
11 Answers
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Does Spring Data JPA have any way to count entites using method name resolving?
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Apparently it is implemented now DATAJPA-231
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How can I get the diff between all the commits that occurred between two dates with Git?
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@brbob I know this was answered a long time ago, but just for someone who stumbles upon this (as I did) Git help says: The command is kept primarily for historical reasons; fingers of many people who learned Git long before git log was...
How do I get IntelliJ to recognize common Python modules?
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Odd. I don't know what a facet is so I looked it up and the below page does not show python as an available facet. jetbrains.com/idea/help/…
– netskink
Apr 17 '15 at 22:51
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Functions that return a function
... to the function, which can be assigned as you've done with var s = a(). s now contains a reference to the function b(), and calling s() is functionally equivalent to calling b().
// Return a reference to the function b().
// In your example, the reference is assigned to var s
return b;
Calling t...
Abstract methods in Python [duplicate]
...e with Python. While the concept seems too easy for me in Java yet up till now I have been unable to understand in Python which is surprising to me at least.
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What APIs are used to draw over other apps (like Facebook's Chat Heads)?
... that events outside of your display area go to the underlying UIs. You'll now find it works, but that other bad things still happen, like the back/menu buttons don't get directed to apps, plus no keyboard. To solve that you need FLAG_NOT_FOCUSABLE.
You get a side effect from the non-focusable bit ...
If I have ACCESS_FINE_LOCATION already, can I omit ACCESS_COARSE_LOCATION?
...p that already requests ACCESS_FINE_LOCATION permission in the manifest, now I want to add a library (MoPub) that requires ACCESS_COARSE_LOCATION .
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