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When vectors are allocated, do they use memory on the heap or the stack?
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vector<Type> vect;
will allocate the vector, i.e. the header info, on the stack, but the elements on the free store ("heap").
vector<Type> *vect = new vector<Type>;
allocates everything on the free store.
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Difference between variable declaration syntaxes in Javascript (including global variables)?
...ually big ones.
There's a fourth way, and as of ES2015 (ES6) there's two more. I've added the fourth way at the end, but inserted the ES2015 ways after #1 (you'll see why), so we have:
var a = 0; // 1
let a = 0; // 1.1 (new with ES2015)
const a = 0; // 1.2 (new with ES2015)
a = 0; ...
Conversion from Long to Double in Java
Is there any way to convert a Long data type to Double or double ?
8 Answers
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Get a UTC timestamp [duplicate]
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new Date().getTime();
For more information, see @James McMahon's answer.
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GRANT EXECUTE to all stored procedures
...g command effectively give the user, "MyUser," permission to execute ALL stored procedures in the database?
4 Answers
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What is the difference between Serialization and Marshaling?
...don't understand how it differs from Serialization. Aren't they both transforming objects into series of bits?
12 Answers
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Python None comparison: should I use “is” or ==?
My editor warns me when I compare my_var == None , but no warning when I use my_var is None .
3 Answers
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Detect IE version (prior to v9) in JavaScript
I want to bounce users of our web site to an error page if they're using a version of Internet Explorer prior to v9. It's just not worth our time and money to support IE pre-v9 . Users of all other non-IE browsers are fine and shouldn't be bounced. Here's the proposed code:
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Python “raise from” usage
...exception; when __suppress_context__ is set to True, the __context__ is ignored when printing a traceback.
When raising from a exception handler where you don't want to show the context (don't want a during handling another exception happened message), then use raise ... from None to set __suppress...
psql: could not connect to server: No such file or directory (Mac OS X)
Upon restarting my Mac I got the dreaded Postgres error:
21 Answers
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