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Underscore vs Double underscore with variables and methods [duplicate]
... E.g.
from M import *
does not import objects whose name starts with an underscore.
single_trailing_underscore_: used by convention to avoid conflicts with Python keyword, e.g.
Tkinter.Toplevel(master, class_='ClassName')
__double_leading_underscore: when naming a class attribute,...
Difference between style = “position:absolute” and style = “position:relative”
Can any one tell me the Difference between style = "position:absolute" and style = "position:relative" and how they differ in case I add it to div / span / input elements?
...
How do I use the conditional operator (? :) in Ruby?
How is the conditional operator ( ? : ) used in Ruby?
7 Answers
7
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Pointers, smart pointers or shared pointers? [duplicate]
I am programming with normal pointers, but I have heard about libraries like Boost that implement smart pointers. I have also seen that in Ogre3D rendering engine there is a deep use of shared pointers.
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Can't access object property, even though it shows up in a console log
...e the output from these two logs. The first clearly shows the full object with the property I'm trying to access, but on the very next line of code, I can't access it with config.col_id_3 (see the "undefined" in the screenshot?). Can anyone explain this? I can get access to every other property ex...
How to implement a good __hash__ function in python [duplicate]
When implementing a class with multiple properties (like in the toy example below), what is the best way to handle hashing?
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.htm vs .html ? Which file extension naming is more correct? [closed]
.... The choice is down to personal preference, provided you’re consistent with your file naming you won’t have a problem with either.
Depending on the configuration of the web server, one of the file types will take precedence over the other. This should not be an issue since it’s unlikely that...
In what cases do I use malloc and/or new?
...ou should call free and when you use the new operator you should pair with delete and it is a mistake to mix the two (e.g. Calling free() on something that was created with the new operator), but I'm not clear on when I should use malloc / free and when I should use new / delete in m...
Differences between Perl and PHP [closed]
...to learn Perl 5 and as I have only used PHP until now, I wanted to know a bit about how the languages differ from each other.
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What happens if I define a 0-size array in C/C++?
...e.
ISO 9899:2011 6.7.6.2:
If the expression is a constant expression, it shall have a value greater than zero.
The above text is true both for a plain array (paragraph 1). For a VLA (variable length array), the behavior is undefined if the expression's value is less than or equal to zero (par...