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Why use #ifndef CLASS_H and #define CLASS_H in .h file but not in .cpp?
... FILE_H
/* ... Declarations etc here ... */
#endif
This is a preprocessor technique of preventing a header file from being included multiple times, which can be problematic for various reasons. During compilation of your project, each .cpp file (usually) is compiled. In simple terms, this mean...
How can I pass parameters to a partial view in mvc 4
...me as if you were to call:
@Html.Partial("_SomePartial", Model)
Now, in order for your partial to actually be able to use this, though, it too needs to have a defined model, for example:
@model Namespace.To.Your.Model
@Html.Action("MemberProfile", "Member", new { id = Model.Id })
Alternativel...
How can you program if you're blind?
Sight is one of the senses most programmers take for granted. Most programmers would spend hours looking at a computer monitor (especially during times when they are in the zone ), but I know there are blind programmers (such as T.V. Raman who currently works for Google).
...
Difference between filter and filter_by in SQLAlchemy
...
filter_by is used for simple queries on the column names using regular kwargs, like
db.users.filter_by(name='Joe')
The same can be accomplished with filter, not using kwargs, but instead using the '==' equality operator, which has been overlo...
How to modify PATH for Homebrew?
...stall ruby 1.9.3, read that I need to install homebrew first. Ran brew doctor, and it's giving me a bunch of warnings. One of which is:
...
Declaring a default constraint when creating a table
...()
I have used square brackets rather than quotes as many readers won't work with QUOTED_IDENTIFIERS on by default.
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Converting from Integer, to BigInteger
..., to BigInteger. I tried typecasting the Integer variable, but i get an error that says inconvertible type.
2 Answers
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Matplotlib scatterplot; colour as a function of a third variable
...nt to make a scatterplot (using matplotlib) where the points are shaded according to a third variable. I've got very close with this:
...
Python unit test with base and sub class
... so your class with common tests doesn't itself inherit from TestCase.
import unittest
class CommonTests(object):
def testCommon(self):
print 'Calling BaseTest:testCommon'
value = 5
self.assertEquals(value, 5)
class SubTest1(unittest.TestCase, CommonTests):
def te...
How to normalize a NumPy array to within a certain range?
After doing some processing on an audio or image array, it needs to be normalized within a range before it can be written back to a file. This can be done like so:
...