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How to override the copy/deepcopy operations for a Python object?
...nd its copy.
obj is some object
shared_attribute_names: A list of strings identifying the attributes that
should be shared between the original and its copy.
memo is the dictionary passed into __deepcopy__. Ignore this argument if
not calling from within __deepcopy__.
...
How big is too big for a PostgreSQL table?
... common to completely remove the ORM from the equation and write a raw sql string to query for performance reasons. Don't let your ORM make data decisions for you! It's an accessory not an essential.
– Stefan Theard
May 24 '17 at 15:03
...
How do you tell someone they're writing bad code? [closed]
... monologue about how their way is the only way. Even though .Net built in string-to-integer parsing, dangit.
– Greg D
Oct 16 '08 at 13:35
...
“implements Runnable” vs “extends Thread” in Java
...re clearly...
public class ThreadVsRunnable {
public static void main(String args[]) throws Exception {
// Multiple threads share the same object.
ImplementsRunnable rc = new ImplementsRunnable();
Thread t1 = new Thread(rc);
t1.start();
Thread.sleep(1000)...
Convert List to List
...e original question you could then use:
class Test
{
static void Main(string[] args)
{
A a = new C(); // OK
IList<A> listOfA = new List<C>().CastList<C,A>(); // now ok!
}
}
and here the wrapper class (+ an extention method CastList for easy use)
publ...
\d is less efficient than [0-9]
...rate a list of all such characters using the following code:
var sb = new StringBuilder();
for(UInt16 i = 0; i < UInt16.MaxValue; i++)
{
string str = Convert.ToChar(i).ToString();
if (Regex.IsMatch(str, @"\d"))
sb.Append(str);
}
Console.WriteLine(sb.ToString());
Which generates...
format date with moment.js
I have a string in this format:
5 Answers
5
...
What is the difference between #include and #include “filename”?
...in a single textual library file (similar to a unix archive), and used the string between the < and > as the key to index into the library.
– Adrian McCarthy
Feb 15 '17 at 23:14
...
How can I parse a YAML file from a Linux shell script?
...YAML types and syntax oddities are correctly handled, as multiline, quoted strings, inline sequences...
\0 padded output is available for solid multiline entry manipulation.
simple dotted notation to select sub-values (ie: subvalue.maintainer is a valid key).
access by index is provided to sequenc...
Case statement with multiple values in each 'when' block
...on happens: When I write this: when "toyota", "lexus", I get: unexpected tSTRING_BEG, expecting keyword_do or '{' or '(' (SyntaxError). However, when I write this: when "toyota","lexus", it works. The only difference is a space after comma.
– Furkan Ayhan
N...