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When to use a View instead of a Table?
...ld design your tables in such a way that your database is well normalized (minimum duplication). This can make querying somewhat difficult.
Views are a bit of separation, allowing you to view the data in the tables differently than they are stored.
...
How to write a Python module/package?
...ow/
├── __init__.py
└── hellostackoverflow.py
At the minimum, we specify the metadata for our package, our setup.py would look like this:
from setuptools import setup
setup(
name='hellostackoverflow',
version='0.0.1',
description='a pip-installable package example...
Why must a lambda expression be cast when supplied as a plain Delegate parameter
...re type parameter S is the formal parameter (the input parameter, which is minimum required to infer rest of the types). Now you can call it like:
var l = new Lambda<int>();
var d1 = l.Func(x => x.ToString());
var e1 = l.Expression(x => "Hello!");
var d2 = l.Func(x => x + x);
//or i...
Why do we have to normalize the input for an artificial neural network?
... easier to optimize because the gradients tend to point towards the global minimum and you can take larger steps.
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Getting individual colors from a color map in matplotlib
... return the under and over colour (respectively). This, by default, is the minimum and maximum colour within the range (so 0.0 and 1.0). This default can be changed with cmap.set_under() and cmap.set_over().
For "special" numbers such as np.nan and np.inf the default is to use the 0.0 value, this ...
What is the difference between a process and a thread?
...ext, a unique process identifier, environment variables, a priority class, minimum and maximum working set sizes, and at least one thread of execution. Each process is started with a single thread, often called the primary thread, but can create additional threads from any of its threads.
Thread
A ...
Query a parameter (postgresql.conf setting) like “max_connections”
... about each
parameter that are not directly available from SHOW, such as minimum
and maximum values.
For your original request:
SELECT *
FROM pg_settings
WHERE name = 'max_connections';
Finally, there is current_setting(), which can be nested in DML statements:
SELECT current_setting('m...
Difference between Divide and Conquer Algo and Dynamic Programming
...planation here where you'll find two algorithm examples: Binary Search and Minimum Edit Distance (Levenshtein Distance) that are illustrating the difference between DP and DC.
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Transparent ARGB hex value
...nel (AA in #AARRGGBB). Maximal value (255 dec, FF hex) means fully opaque. Minimum value (0 dec, 00 hex) means fully transparent. Values in between are semi-transparent, i.e. the color is mixed with the background color.
To get a fully transparent color set the alpha to zero. RR, GG and BB are irre...
Format an Integer using Java String Format
... ... as a decimal integer
// │└─────── ... minimum of 3 characters wide
// └──────── ... pad with zeroes instead of spaces
See java.util.Formatter for more information.
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