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What is a WeakHashMap and when to use it? [duplicate]
What is a WeakHashMap and when should one be using it? What are the differences between a WeakHashMap and a HashMap ?
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Why is JavaScript called JavaScript, since it has nothing to do with Java? [closed]
...avaScript, was originally named Mocha, later it was renamed to LiveScript, and then to JavaScript.
The LiveScript to JavaScript name change came because Netscape and Sun did a license agreement.
The language was then submitted for standarization to the ECMA International Organization. By that time...
How to pass command line arguments to a shell alias? [duplicate]
How do I pass the command line arguments to an alias? Here is a sample:
11 Answers
11
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How do you convert an entire directory with ffmpeg?
How do you convert an entire directory/folder with ffmpeg via command line or with a batch script?
24 Answers
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Edit and Continue: “Changes are not allowed when…”
Even if I create a clean WinForms project, Edit and Continue doesn't work and gives me the error:
36 Answers
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What is the best way to implement constants in Java? [closed]
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That is perfectly acceptable, probably even the standard.
(public/private) static final TYPE NAME = VALUE;
where TYPE is the type, NAME is the name in all caps with underscores for spaces, and VALUE is the constant value;
I highly recommend NOT putting your constants in ...
Opening port 80 EC2 Amazon web services [closed]
...to the "Network & Security" -> Security Group settings in the left hand navigation
Find the Security Group that your instance is apart of
Click on Inbound Rules
Use the drop down and add HTTP (port 80)
Click Apply and enjoy
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How to check if all elements of a list matches a condition?
...ne this with a generator expression to produce the result you want cleanly and efficiently. For example:
>>> items = [[1, 2, 0], [1, 2, 0], [1, 2, 0]]
>>> all(flag == 0 for (_, _, flag) in items)
True
>>> items = [[1, 2, 0], [1, 2, 1], [1, 2, 0]]
>>> all(flag == ...
Clicking the back button twice to exit an activity
I've noticed this pattern in a lot of Android apps and games recently: when clicking the back button to "exit" the application, a Toast comes up with a message similar to "Please click BACK again to exit".
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Why unsigned integer is not available in PostgreSQL?
...post ( What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL? ) and realized that PostgreSQL does not support unsigned integer.
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