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Where is the C auto keyword used?
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One possible use is in forward declaration of nested functions in GNU C - although this is a hijacking of the original definition of auto. tigcc.ticalc.org/doc/keywords.html#auto
– josiah
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Should I pass a shared_ptr by reference? [duplicate]
...ine that several concurrent contexts have a reference to the same SP; then one could reset() it and the other would end up not just with a modified reference to the SP, but also with a possibly invalid pointer to the resource.
– Kerrek SB
Dec 5 '11 at 13:23
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Pointer vs. Reference
... is in a usable state. Hence, no NULL-check or error handling needs to be done for that value.
Rationale 3: Rationales 1 and 2 will be compiler enforced. Always catch errors at compile time if you can.
If a function argument is an out-value, then pass it by reference.
Rationale: We don't want to ...
A cron job for rails: best practices?
...puts "Pulling new requests..."
EdiListener.process_new_messages
puts "done."
end
To execute from the command line, this is just "rake cron". This command can then be put on the operating system cron/task scheduler as desired.
Update this is quite an old question and answer! Some new info:
t...
C++ convert hex string to signed integer
...tand the "0x" notation. So both the boost::lexical_cast and my hand rolled one don't deal well with hex strings. The above solution which manually sets the input stream to hex will handle it just fine.
Boost has some stuff to do this as well, which has some nice error checking capabilities as well....
When is finally run if you throw an exception from the catch block?
...own (i.e. after the catch block is executed)
editing this 7 years later - one important note is that if e is not caught by a try/catch block further up the call stack or handled by a global exception handler, then the finally block may never execute at all.
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What is the email subject length limit?
...or no more than 78 characters in the subject header sounds reasonable. No one wants to scroll to see the entire subject line, and something important might get cut off on the right.
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Splitting a string into chunks of a certain size
... keep in mind that LINQ and it's magic is not as easy to understand to someone that just wants to look at a solution to this problem. A person must now understand what the Enumerable.Range() and .Select() functions do. I will not argue that you should have an understanding of that to write C#/.NET ...
How to store Node.js deployment settings/configuration files?
...uld be to have a settings.py file containing the standard settings (timezone, etc), and then a local_settings.py for deployment specific settings, ie. what database to talk to, what memcache socket, e-mail address for the admins and so on.
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How to avoid overflow in expr. A * B - C * D
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This seems too trivial I guess.
But A*B is the one that could overflow.
You could do the following, without losing precision
A*B - C*D = A(D+E) - (A+F)D
= AD + AE - AD - DF
= AE - DF
^smaller quantities E & F
E = B - D (hence, far s...