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Queries vs. Filters
... query
Query hello sam (using keyword must)
curl localhost:9200/myindex/_search?pretty -d '
{
"query": { "bool": { "must": { "match": { "msg": "hello sam" }}}}
}'
Document "Hello world! I am Sam." is assigned a higher score than "Hello world!", because the former matches both words in the qu...
How do I migrate a model out of one django app and into a new one?
...on and specific:
myproject/
|-- common
| |-- migrations
| | |-- 0001_initial.py
| | `-- 0002_create_cat.py
| `-- models.py
`-- specific
|-- migrations
| |-- 0001_initial.py
| `-- 0002_create_dog.py
`-- models.py
Now we want to move model common.models.cat to specif...
Can I zip more than two lists together in Scala?
...neLists[A](ss:List[A]*) = {
val sa = ss.reverse;
(sa.head.map(List(_)) /: sa.tail)(_.zip(_).map(p=>p._2 :: p._1))
}
For example:
combineLists(List(1, 2, 3), List(10,20), List(100, 200, 300))
// => List[List[Int]] = List(List(1, 10, 100), List(2, 20, 200))
The answer is truncated t...
Remove a string from the beginning of a string
...
Plain form, without regex:
$prefix = 'bla_';
$str = 'bla_string_bla_bla_bla';
if (substr($str, 0, strlen($prefix)) == $prefix) {
$str = substr($str, strlen($prefix));
}
Takes: 0.0369 ms (0.000,036,954 seconds)
And with:
$prefix = 'bla_';
$str = 'bla_string...
Python multiprocessing pool.map for multiple arguments
... function:
import multiprocessing
from itertools import product
def merge_names(a, b):
return '{} & {}'.format(a, b)
if __name__ == '__main__':
names = ['Brown', 'Wilson', 'Bartlett', 'Rivera', 'Molloy', 'Opie']
with multiprocessing.Pool(processes=3) as pool:
results = poo...
Creating a blocking Queue in .NET?
...ublic class BlockingQueue<T>
{
private readonly Subject<T> _queue;
private readonly IEnumerator<T> _enumerator;
private readonly object _sync = new object();
public BlockingQueue()
{
_queue = new Subject<T>();
_enumerator = _queue.GetEnume...
Allowed characters in Linux environment variable names
...EE Std
1003.1-2001 consist solely of uppercase letters, digits, and the '_'
(underscore) from the characters
defined in Portable Character Set and
do not begin with a digit. Other
characters may be permitted by an
implementation; applications shall
tolerate the presence of such names.
...
How to print a percentage value in python?
...If you don't want integer division, you can import Python3's division from __future__:
>>> from __future__ import division
>>> 1 / 3
0.3333333333333333
# The above 33% example would could now be written without the explicit
# float conversion:
>>> print "{0:.0f}%".format...
ValidateAntiForgeryToken purpose, explanation and example
...
It seems that the form __RequestVerificationToken and cookie __RequestVerificationToken are not the same, they work as a pair.
– WaiKit Kung
Apr 8 '15 at 15:54
...
Which SQL query is faster? Filter on Join criteria or Where clause?
...
# explain analyze select e.* from event e join result r on e.id = r.event_id and r.team_2_score=24;
QUERY PLAN
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