Tutorial by Examples: s

Like for 1D signals, it's possible to filter images by applying a Fourier transformation, multiplying with a filter in the frequency domain, and transforming back into the space domain. Here is how you can apply high- or low-pass filters to an image with Matlab: Let image be the original, unfiltere...

use Symfony\Component\EventDispatcher\EventDispatcher; use Symfony\Component\EventDispatcher\Event; use Symfony\Component\EventDispatcher\GenericEvent; // you may store this in a dependency injection container for use as a service $dispatcher = new EventDispatcher(); // you can attach liste...

use Symfony\Component\EventDispatcher\EventDispatcher; use Symfony\Component\EventDispatcher\EventSubscriberInterface; use Symfony\Component\EventDispatcher\Event; $dispatcher = new EventDispatcher(); // you can attach event subscribers, which allow a single object to subscribe // to many ...

By default stored procedures and functions or not generated by mysqldump, you will need to add the parameter --routines (or -R): mysqldump -u username -p -R db_name > dump.sql When using --routines the creation and change time stamps are not maintained, instead you should dump and reload the ...

#include <stddef.h> /* for offsetof() */ #include <stdlib.h> /* for exit() */ #include <stdio.h> /* for perror() */ #include <string.h> /* for strcmp() */ #include <unistd.h> /* for close(), unlink() */ #include <fcntl.h> /* for open() */ #incl...

In [1]: import pandas as pd In order to run a query in BigQuery you need to have your own BigQuery project. We can request some public sample data: In [2]: data = pd.read_gbq('''SELECT title, id, num_characters ...: FROM [publicdata:samples.wikipedia] ...: ...

If you have created service account and have private key json file for it, you can use this file to authenticate with pandas In [5]: pd.read_gbq('''SELECT corpus, sum(word_count) words FROM [bigquery-public-data:samples.shakespeare] GROUP BY co...

This example demonstrates how to do compile time checking of an annotated element. The annotation The @Setter annotation is a marker can be applied to methods. The annotation will be discarded during compilation not be available afterwards. package annotation; import java.lang.annotation.Eleme...

import java.time.LocalTime; import java.time.ZoneId; import java.time.temporal.ChronoUnit; public class Test { public static void main(String[] args) { ZoneId zone1 = ZoneId.of("Europe/Berlin"); ZoneId zone2 = ZoneId.of("Brazil/East"); ...

When a module is using at expressions, such as: #lang at-exp racket/base or #lang scribble/manual You have access to the following types of comments: @;{Block text that goes until the closing brace.} As well as: @; Single line text. Note that if you are using a language that ...

The trick is to use a look-behind with the regex \G, which means "end of previous match": String[] parts = str.split("(?<=\\G.{8})"); The regex matches 8 characters after the end of the last match. Since in this case the match is zero-width, we could more simply say "...

Same as the known length example, but insert the length into regex: int length = 5; String[] parts = str.split("(?<=\\G.{" + length + "})");

PhraseQuery is used to search for a sequence of terms. The following matches the phrase "Hello World" (after being indexed with StandardAnalyzer) Query query = new PhraseQuery.Builder() .add(new Term("text", "hello")) .add(new Term("text"...

This combines queries such that the best (that is, highest-scoring) match of it's subqueries contributes to the final score. List<Query> disjuncts = new ArrayList<Query>(); disjuncts.add(new TermQuery(new Term("fieldname", "hello"))); disjuncts.add(new TermQuery(...

A query can be boosted to increase it's score relative to other subqueries. This is done by wrapping it with a BoostQuery Query lessRelevantQuery = new TermQuery(new Term("fieldname", "ipsum")); //Five times as interesting Query highlyRelevantQuery = new BoostQuery( ...

The authentic Adobe PostScript interpreters are available in high-end printers, the Display PostScript (DPS) product, and the Acrobat Distiller product. As authors of the standard, these products are considered "the standard implementation" for the purpose of describing differences among P...

There different flavors of DB2. One of them is LUW: Linux, UNIX and Windows. DB2 LUW in Linux / UNIX can be installed with or without root. When installed with root, you can create different instances associating them to different users. When installing DB2 LUW without root privileges, you can ins...

When a table has an AUTO_INCREMENT PRIMARY KEY, normally one does not insert into that column. Instead, specify all the other columns, then ask what the new id was. CREATE TABLE t ( id SMALLINT UNSIGNED AUTO_INCREMENT NOT NULL, this ..., that ..., PRIMARY KEY(id) ); INSERT I...

To access MySQL from the command line: mysql --user=username --password=pwd --host=hostname test_db This can be shortened to: mysql -u username -p password -h hostname test_db By omitting the password value MySQL will ask for any required password as the first input. If you specify password ...

This set of example show how to execute commands stored in strings or script files, without the need of the interactive prompt. This is especially useful to when a shell script needs to interact with a database. Execute command from a string $ mysql -uroot -proot test -e'select * from people' +...