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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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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...
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 data type to use for hashed password field and what length?
...cker gains access to your database, they'd have to construct their rainbow table based on that salt. And that's just as much work as simply guessing the password.
– Bill Karwin
Sep 16 '10 at 7:14
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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...
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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Saving results with headers in Sql Server Management Studio
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Try the Export Wizard. In this example I select a whole table, but you can just as easily specify a query:
(you can also specify a query here)
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What is the difference between SQL, PL-SQL and T-SQL?
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Correction: SQL is a language to operate on tables for which SQL itself provides the definition. The SQL Standard avoids the words 'set' and 'relation' and their derivatives. SQL tables are not sets.
– onedaywhen
Nov 25 '11 at 12:...
How do I update an entity using spring-data-jpa?
...ries and possibly the query can be quite expensive since it may join other tables and load any collections that have fetchType=FetchType.EAGER
Spring-data-jpa supports update operation.
You have to define the method in Repository interface.and annotated it with @Query and @Modifying.
@Modifying
@Q...
jquery get all form elements: input, textarea & select
...on, sometimes this differs from children such as when the form tag is in a table and is not closed.
var summary = [];
$('form').each(function () {
summary.push('Form ' + this.id + ' has ' + $(this).find(':input').length + ' child(ren).');
summary.push('Form ' + this.id + ' has ' + th...