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Differences between TCP sockets and web sockets, one more time [duplicate]
...ou can do message based communication using TCP sockets, but you need some extra layer/encapsulation that is adding framing/message boundary data to the messages so that the original messages can be re-assembled from the pieces. In fact, WebSockets is built on normal TCP sockets and uses frame heade...
How does C compute sin() and other math functions?
...come possible fairly recently. In some cases this can be slow because many extra digits may need to be calculated to ensure correct rounding. In other cases it is extremely quick -- for small enough numbers the answer is just the angle.
– Bruce Dawson
Oct 16 '1...
Table name as variable
...ableName NVARCHAR(100)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
DECLARE @sSQL nvarchar(500);
SELECT @sSQL = N'SELECT * FROM' + QUOTENAME(@TableName);
EXEC sp_executesql @sSQL
END
...
Convert a list to a dictionary in Python
...
You can also do it like this (string to list conversion here, then conversion to a dictionary)
string_list = """
Hello World
Goodbye Night
Great Day
Final Sunset
""".split()
string_list = dict(zip(string_list[::2],string_list...
Evenly distributing n points on a sphere
...wer is closer to the “reason it works” while Martin’s squeaks out an extra bit of precision. So the golden ratio by definition satisfies φ² = φ + 1, which rearranges to φ – 1 = 1/φ, multiplying by 2 π, that leading digit 1 just gets nuked by the trig functions. So in floating point, ju...
Add new methods to a resource controller in Laravel
...Determine if the current route matches a given name.
*
* @param string $name
* @return bool
*/
public static function is($name)
{
return static::$app['router']->currentRouteNamed($name);
}
/**
* Determine if the current route uses a given contro...
XML Document to String
What's the simplest way to get the String representation of a XML Document ( org.w3c.dom.Document )? That is all nodes will be on a single line.
...
How to correctly close a feature branch in Mercurial?
...branch)
Another way is to close a feature branch before merging using an extra commit:
$ hg up feature-x
$ hg ci -m 'Closed branch feature-x' --close-branch
$ hg up default
$ hg merge feature-x
$ hg ci -m merge
$ hg heads
(1 head)
$ hg branches
default 43:...
(1 branch)
The first o...
What is the difference between trie and radix trie data structures?
...ll be root["smiles"[5]]. This brings us to smiles_item, and the end of our string. Our search has terminated, and the item has been retrieved, with just three node accesses instead of eight.
What is a PATRICIA trie?
A PATRICIA trie is a variant of radix tries for which there should only ever be ...
Expand a random range from 1–5 to 1–7
...
Very nice! Can we retain the extra entropy without growing state? The trick is to notice that both upper- and lower- bounds are at all times rational numbers. We can add, subtract, and multiply these without losing precision. If we do it all in base-35, ...