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What is the id( ) function used for?
...questions:
What is the number returned from the function?
It is "an integer (or long integer) which is guaranteed to be unique and constant for this object during its lifetime." (Python Standard Library - Built-in Functions) A unique number. Nothing more, and nothing less. Think of it as a so...
How to use the IEqualityComparer
...ue. Distinct relies on a good hash function to work efficiently because it internally builds a hash table.
When implementing interfaces of classes it is important to read the documentation, to know which contract you’re supposed to implement.1
In your code, the solution is to forward GetHashCode...
How can I get the version defined in setup.py (setuptools) in my package?
....py
from setuptools import setup, find_packages
from distutils.util import convert_path
main_ns = {}
ver_path = convert_path('mymodule/version.py')
with open(ver_path) as ver_file:
exec(ver_file.read(), main_ns)
setup(...,
version=main_ns['__version__'],
...)
And in mymodule/version....
Android imageview not respecting maxWidth?
...t should display an arbitrary image, a profile picture downloaded from the internet. I want this the ImageView to scale its image to fit inside the height of the parent container, and a set max width of 60dip. However, if the image is tall ratio-wise, and doesn't need the full 60dip of width, the Im...
When to use references vs. pointers
I understand the syntax and general semantics of pointers versus references, but how should I decide when it is more-or-less appropriate to use references or pointers in an API?
...
What's the difference between setWebViewClient vs. setWebChromeClient?
...e.
After that, you configure your WebViewClient. WebViewClient is an event interface. By providing your own implementation of WebViewClient, you can respond to rendering events. For example, you could detect when the renderer starts loading an image from a particular URL or decide whether to resubmi...
Why is parenthesis in print voluntary in Python 2.7?
...s:
print expr1, expr2, ... exprn
(Each expression in turn is evaluated, converted to a string and displayed with a space between them.)
But remember that putting parentheses around an expression is still the same expression.
So you can also write this as:
print (expr1), (expr2), ... (expr3)
...
Can I create a named default constraint in an add column statement in SQL Server?
...d work:
ALTER TABLE t_tableName
ADD newColumn VARCHAR(50)
CONSTRAINT YourContraintName DEFAULT '' NOT NULL
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moment.js - UTC gives wrong date
...time defaults to midnight.
In your code, you create a local date and then convert it to the UTC timezone (in fact, it makes the moment instance switch to UTC mode), so when it is formatted, it is shifted (depending on your local time) forward or backwards.
If the local timezone is UTC+N (N being a...
Difference between Bridge pattern and Adapter pattern
...se, but out of your control, or otherwise not changeable to quite meet the interface you need it to. For instance, we have a SuperWeaponsArray which can control a fine array of doomsday devices.
public class SuperWeaponsArray {
/*...*/
public void destroyWorld() {
for (Weapon w : armedW...