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Why is __init__() always called after __new__()?
...ou're
subclassing an immutable type like
str, int, unicode or tuple.
From April 2008 post: When to use __new__ vs. __init__? on mail.python.org.
You should consider that what you are trying to do is usually done with a Factory and that's the best way to do it. Using __new__ is not a good clea...
Default constructor vs. inline field initialization
...t it's the same functionality for less code (which is always good).
Apart from that, no difference.
However, if you do have explicit constructors, I'd prefer to put all initialization code into those (and chain them) rather than splitting it up between constructors and field initializers.
...
What exactly does an #if 0 … #endif block do?
...tax error! Why? Because block comments do not nest, and so (as you can see from SO's syntax highlighting) the */ after the word "NULL" terminates the comment, making the baz call not commented out, and the */ after baz a syntax error. On the other hand:
#if 0
foo();
bar(x, y); /* x must not be NULL...
Code for Greatest Common Divisor in Python [closed]
...
It's in the standard library.
>>> from fractions import gcd
>>> gcd(20,8)
4
Source code from the inspect module in Python 2.7:
>>> print inspect.getsource(gcd)
def gcd(a, b):
"""Calculate the Greatest Common Divisor of a and b.
U...
Difference between fold and reduce?
... types.
With reduce, you apply a function f to every list element starting from the first one:
f (... (f i0 i1) i2 ...) iN.
With fold, you apply f starting from the accumulator s:
f (... (f s i0) i1 ...) iN.
Therefore, reduce results in an ArgumentException on empty list. Moreover, fold is mo...
Sign APK without putting keystore info in build.gradle
...
I had to remove the quotes from my keystore.properties
– Jacob Tabak
Jan 26 '14 at 7:58
6
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Regex using javascript to return just numbers
...
I guess you want to get number(s) from the string. In which case, you can use the following:
// Returns an array of numbers located in the string
function get_numbers(input) {
return input.match(/[0-9]+/g);
}
var first_test = get_numbers('something102')...
Check if page gets reloaded or refreshed in JavaScript
...anks buddy this is accurate solution to detect either the page is reloaded from right click/refresh from the browser or reloaded by the url.
– Roque Mejos
Aug 8 '16 at 8:01
...
.Net picking wrong referenced assembly version
...ts use the latest assembly. Also make sure they are grabbing the assembly from a local path instead of the GAC. (I really really don't like the GAC. It has caused no end of issues on some projects I've been on). We typically have an "Assemblies" folder that all projects use for external assembly ...
How do I convert from int to Long in Java?
I keep finding both on here and Google people having troubles going from long to int and not the other way around. Yet I'm sure I'm not the only one that has run into this scenario before going from int to Long .
...