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Difference between scaling horizontally and vertically for databases [closed]
... the need for scaling that is increasing resources so that your system can now handle more requests than it earlier could.
When you realise your system is getting slow and is unable to handle the current number of requests, you need to scale the system.
This provides you with two options. Either...
How can I get a precise time, for example in milliseconds in Objective-C?
...liseconds
// Use (-) modifier to conversion since receiver is earlier than now
double timePassed_ms = [date timeIntervalSinceNow] * -1000.0;
Documentation on timeIntervalSinceNow.
There are many other ways to calculate this interval using NSDate, and I would recommend looking at the class documen...
How to serialize a lambda?
...e any use of such a cast expression outside of casting lambdas? E.g. is it now also possible to do something similar with an ordinary anonymous class?
– Balder
Apr 2 '14 at 10:50
6...
psycopg2: insert multiple rows with one query
...)
Printing the insert_query outputs
insert into t (a, b) values %s,%s
Now to the usual Psycopg arguments substitution
cursor.execute(insert_query, data)
Or just testing what will be sent to the server
print (cursor.mogrify(insert_query, data).decode('utf8'))
Output:
insert into t (a, b) ...
Inject errors into already validated form?
...collision I'd like to send the form back with an error on it, but I won't know until I actually try to do the database insert. (In theory the validator could check the database, but that smells and is race-prone.)
– Weeble
May 19 '10 at 15:53
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What is the purpose of std::make_pair vs the constructor of std::pair?
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@Tor Yeah, I know how to use both of them, I was just curious if there was a reason for std::make_pair. Apparently it is just for convenience.
– user542687
Feb 14 '12 at 1:56
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Should I learn C before learning C++? [closed]
...at is true whether or not you started with C or started with C++.
If you know C first, then that is good plus to learning C++. You will start with knowing a chunk of the language. If you do not know C first then there is no point focusing on a different language. There are plenty of good books a...
How do I tokenize a string in C++?
... of strtok, but strtok will still mess up because the string changed, it's now already past the null character, and it's going to keep reading memory until it either gets a security violation or finds a null character. This is a problem with the original C string functions, if you don't specify a l...
VB.NET equivalent of C# property shorthand?
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@rap, now implement "public string FirstName {get; private set;}" in VB :P
– Blorgbeard is out
Mar 18 '14 at 21:11
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How to add reference to a method parameter in javadoc?
...ed in other answers; you can use {@code foo}. This is especially good to know when you refer to a generic type such as {@code Iterator<String>} -- sure looks nicer than <code>Iterator&lt;String&gt;</code>, doesn't it!
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