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How do BitTorrent magnet links work?
... this using a separate peer-to-peer network2 operating a "distributed hash table" (DHT). A DHT is a big distributed index which maps torrents (identified by infohashes) to lists of peers (identified by IP address and ports) who are participating in a swarm for that torrent (uploading/downloading dat...
Selecting a row of pandas series/dataframe by integer index
...ing @HYRY, see the new docs in 0.11
http://pandas.pydata.org/pandas-docs/stable/indexing.html
Here we have new operators, .iloc to explicity support only integer indexing, and .loc to explicity support only label indexing
e.g. imagine this scenario
In [1]: df = pd.DataFrame(np.random.rand(5,2),i...
Get ID of last inserted document in a mongoDB w/ Java driver
...
This is insert operation:
DBCollection table1 = db.getCollection("Collection name");
BasicDBObject document = new BasicDBObject();
document.put("_id",value);
document.put("Name", name);
table1.insert(document);
After insert u get last inserted id:
DBColle...
What is Full Text Search vs LIKE
...cument set {d1, d5, d9,.. dn} is returned.
You could hack a de-normalized table schema to store documents - each row in MySQL table will be considered as "document" and a TEXT column could contain a paragraph etc. The inverted index will contain the terms as hash keys and the row-ids as the documen...
What's the difference between equal?, eql?, ===, and ==?
...programming languages, such as Ruby, provide a collection type called hash table. Hash tables are dictionary-like collections which store data in pairs, consisting of unique keys and their corresponding values. Under the hood, those keys are stored as hashcodes. Hash tables are commonly referred to ...
Understanding Python's “is” operator
...ame integer object which is reused. Works in Python since integers are immutable. If you do x=1.0; y=1.0 or x=9999;y=9999, it won't be the same identity, because floats and larger ints aren't interned.
– Magnus Lyckå
Sep 21 '17 at 13:56
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Managing relationships in Laravel, adhering to the repository pattern
... design patterns in Laravel I found myself creating repositories for every table on the application.
4 Answers
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Nearest neighbors in high-dimensional data?
...set of points in a high-dimensional space into a set of bins, i.e., a hash table [1][3]. But unlike traditional hashes, a locality-sensitive hash places nearby points into the same bin.
LSH has some huge advantages. First, it is simple. You just compute the hash for all points in your database, the...
Difference between JOIN and INNER JOIN
...specify CROSS JOIN.
OR
For an inner join, the syntax is:
SELECT ...
FROM TableA
[INNER] JOIN TableB
(in other words, the "INNER" keyword is optional - results are the same
with or without it)
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Change default primary key in Eloquent
...gusflyer You are kidding right ? More than one primary key in one database table?
– Novica89
Oct 1 '14 at 10:39
@bagus...