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Why doesn't Java Map extend Collection?
...doesn't Map extend Collection?
This was by design. We feel that
mappings are not collections and
collections are not mappings. Thus, it
makes little sense for Map to extend
the Collection interface (or vice
versa).
If a Map is a Collection, what are the
elements? The only reaso...
Remove carriage return in Unix
...at is the simplest way to remove all the carriage returns \r from a file in Unix?
20 Answers
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Why doesn't Git ignore my specified file?
I added the following line to .gitignore :
13 Answers
13
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SQLite - UPSERT *not* INSERT or REPLACE
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Assuming three columns in the table: ID, NAME, ROLE
BAD: This will insert or replace all columns with new values for ID=1:
INSERT OR REPLACE INTO Employee (id, name, role)
VALUES (1, 'John Foo', 'CEO');
BAD: This will i...
Where are the Properties.Settings.Default stored?
I thought I knew this, but today I'm being proven wrong - again.
9 Answers
9
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Execute code when Django starts ONCE only?
I'm writing a Django Middleware class that I want to execute only once at startup, to initialise some other arbritary code. I've followed the very nice solution posted by sdolan here , but the "Hello" message is output to the terminal twice . E.g.
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REST API Best practices: args in query string vs in request body
A REST API can have arguments in several places:
3 Answers
3
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Status bar won't disappear
I'm creating an application and I want the status bar hidden. When I test the app, the status bar is hidden whilst the splash screen is shown, but once the app is fully loaded, the status bar reappears.
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How do ACID and database transactions work?
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ACID is a set of properties that you would like to apply when modifying a database.
Atomicity
Consistency
Isolation
Durability
A transaction is a set of related changes which is used to achieve some of the ACID properties. Transactions are tools to achieve the ACID properties.
Atomicity ...
When is TCP option SO_LINGER (0) required?
I think I understand the formal meaning of the option. In some legacy code I'm handling now, the option is used. The customer complains about RST as response to FIN from its side on connection close from its side.
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