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What __init__ and self do on Python?
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In this code:
class A(object):
def __init__(self):
self.x = 'Hello'
def method_a(self, foo):
print self.x + ' ' + foo
... the self variable represents the instance of the object itself. Most object-oriented languages pass this as a hidden p...
Using i and j as variables in Matlab
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Because i and j are both functions denoting the imaginary unit:
http://www.mathworks.co.uk/help/matlab/ref/i.html
http://www.mathworks.co.uk/help/matlab/ref/j.html
So a variable called i or j will override them, potentially silently breaking code that does complex maths.
Possible...
Getting “type or namespace name could not be found” but everything seems ok?
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This can be the result of a .Net framework version incompatibility between two projects.
It can happen in two ways:
a client profile project referencing a full framework project; or
an older framework version targeting a newer framework version
For example it will happen when an ...
optional local variables in rails partial templates: how do I get out of the (defined? foo) mess?
...emplates to set default values for local variables if a value wasn't explicitly defined in the :locals hash when rendering the partial --
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Why does 2 == [2] in JavaScript?
I recently discovered that 2 == [2] in JavaScript. As it turns out, this quirk has a couple of interesting consequences:
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unit testing of private functions with mocha and node.js
I am using mocha in order to unit test an application written for node.js
9 Answers
9
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Pass arguments to Constructor in VBA
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Here's a little trick I'm using lately and brings good results. I would like to share with those who have to fight often with VBA.
1.- Implement a public initiation subroutine in each of your custom classes. I call it InitiateProperti...
Thread-safe List property
...entation of List<T> as a property which can be used thread-safely without any doubt.
16 Answers
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Is inline assembly language slower than native C++ code?
...ays produce faster code than high-level language (C++ and C in this case). It's not true. Is C code always faster than Java code? No because there is another variable: programmer. The way you write code and knowledge of architecture details greatly influence performance (as you saw in this case).
Y...
Virtual functions and performance - C++
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A good rule of thumb is:
It's not a performance problem until you can prove it.
The use of virtual functions will have a very slight effect on performance, but it's unlikely to affect the overall performance of your application. Better places to lo...