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What is the difference between “ is None ” and “ ==None ”
...actually
makes sense; if someone told you to
implement the None object from
scratch, how else would you get it to
compare True against itself?).
Practically-speaking, there is not much difference since custom comparison operators are rare. But you should use is None as a general rule.
...
How to round up the result of integer division?
... it once, you don't need to store the recordsPerPage specially if it comes from an expensive function to fetch the value from a config file or something.
I.e. this might be inefficient, if config.fetch_value used a database lookup or something:
int pageCount = (records + config.fetch_value('recor...
Injecting a mock into an AngularJS service
...yDependency', mockDependency);
});
});
it('should return value from mock dependency', inject(function (myService) {
expect(myService.useDependency()).toBe('mockReturnValue');
}));
});
Note that because of the call to $provide.value you don't actually need to explicitly inject ...
Why doesn't C++ have a garbage collector?
...eople not being able to come to a general consensus fast enough.
A quote from Bjarne Stroustrup himself:
I had hoped that a garbage collector
which could be optionally enabled
would be part of C++0x, but there were
enough technical problems that I have
to make do with just a detailed
...
How to calculate a logistic sigmoid function in Python?
...scipy.org/doc/scipy/reference/generated/scipy.stats.logistic.html
In [1]: from scipy.stats import logistic
In [2]: logistic.cdf(0.458)
Out[2]: 0.61253961344091512
which is only a costly wrapper (because it allows you to scale and translate the logistic function) of another scipy function:
In [3...
What is the difference between related SQLite data-types like INT, INTEGER, SMALLINT and TINYINT?
...g you used to know about standalone database datatypes
Read the above link from the SQLite site.
Take the types based off of your old schema, and see what they'd map to in SQLite
Migrate all the data to the SQLite database.
Note: The datatype limitations can be cumbersome, especially if you add ti...
Determining complexity for recursive functions (Big O notation)
...Fun2(n-5);
}
This function is called n-5 for each time, so we deduct five from n before calling the function, but n-5 is also O(n).
(Actually called order of n/5 times. And, O(n/5) = O(n) ).
int recursiveFun3(int n)
{
if (n <= 0)
return 1;
else
return 1 + recursiveFun3(n...
Calculate number of hours between 2 dates in PHP
...riod not being able to generate dates when the start date is in the future from the end date. See: 3v4l.org/Ypsp1 to use a negative date, you need to specify a negative interval, DateInterval::createFromDateString('-1 hour'); with a start date in the past of from the end date.
...
Limitations of SQL Server Express
...
But this is easily worked around: Is there a way to stop SQL Express 2008 from Idling?
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Launching an application (.EXE) from C#?
How can I launch an application using C#?
9 Answers
9
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