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To add a background-image rule via the CSSOM, first get a reference to the rules of the first stylesheet: var stylesheet = document.styleSheets[0].cssRules; Then, get a reference to the end of the stylesheet: var end = stylesheet.length - 1; Finally, insert a background-image rule for the bo...

This is a step by step guide to set up the automated build process using Jenkins CI for your Android projects. The following steps assume that you have new hardware with just any flavor of Linux installed. It is also taken into account that you might have a remote machine. PART I: Initial setup on ...

First of all, Ensure that the user which will be running this call has the Change backup settings and control backup process privilege. # # TC Backup Launcher # Script to launch a backup on the TeamCity Server # Param( [Parameter(Mandatory=$true)][string]$username, [Parameter(Mandato...

Lifecycle Monitoring in Akka is usually referred to as DeathWatch. Monitoring is thus used to tie one actor to another so that it may react to the other actor’s termination, in contrast to supervision which reacts to failure. Monitoring Monitoring is particularly useful if a supervisor ...

The ClassLoader needs to provide a ProtectionDomain identifying the source of the code: public class PluginClassLoader extends ClassLoader { private final ClassProvider provider; private final ProtectionDomain pd; public PluginClassLoader(ClassProvider provider) { this...

Applications running in non-development environments often require database updates. After using the Add-Migration command to create your database patches there's the need to run the updates on other environments, and then the test environment as well. Challenges commonly faced are: no Visual S...

Let say you want to build your API to comply jsonapi.org specification and the result should look like: { "article": { "id": "305", "type": "articles", "attributes": { "title": "Asking Alexandria&q...

from pymongo import MongoClient uri = "mongodb://localhost:27017/" client = MongoClient(uri) db = client['test_db'] # or # db = client.test_db # collection = db['test_collection'] # or collection = db.test_collection collection.save({"hello":"world"...

import cv2 import numpy as np import urllib stream=urllib.urlopen('http://96.10.1.168/mjpg/video.mjpg') bytes='' while True: bytes+=stream.read(1024) a = bytes.find('\xff\xd8') # JPEG start b = bytes.find('\xff\xd9') # JPEG end if a!=-1 and b!=-1: jpg = bytes[a:b+...

"Fat Model, Skinny Controller" is a very good first step, but it doesn't scale well once your codebase starts to grow. Let's think on the Single Responsibility of models. What is the single responsibility of models? Is it to hold business logic? Is it to hold non-response-related logic? ...

First you have to generate public and private keys using OpenSSL(tutorial). var express = require("express"); var http =require ("http"); var https=require ("https"); var fs=require("fs"); var app=express(); var httpsKeys={ key:fs.readFileSync("&l...

In your Maven project, add the following to your pom.xml file. The following versions are for Cassandra 3.x. <dependency> <groupId>com.datastax.cassandra</groupId> <artifactId>cassandra-driver-core</artifactId> <version>3.1.0</ve...

Connecting to Cassandra is very similar to connecting to other datasources. With Cassandra, credentials are not required. String cassandraIPAddress = "127.0.0.1"; String cassandraKeyspace = "myKeyspace"; String username = "foo"; String password = "bar"; ...

public enum Cassandra { DB; private Session session; private Cluster cluster; private static final Logger LOGGER = LoggerFactory.getLogger(Cassandra.class); /** * Connect to the cassandra database based on the connection configuration provided. * Multiple c...

This fetches the value of NOW() in local time, in India Standard Time, and then again in UTC. SELECT NOW(); SET time_zone='Asia/Kolkata'; SELECT NOW(); SET time_zone='UTC'; SELECT NOW();

An integer literal is a primary expression of the form decimal-literal It is a non-zero decimal digit (1, 2, 3, 4, 5, 6, 7, 8, 9), followed by zero or more decimal digits (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) int d = 42; octal-literal It is the digit zero (0) followed by zero or more octal dig...

This is really easy. All TIMESTAMP values are stored in universal time, and always converted to the present time_zone setting whenever they are rendered. SET SESSION time_zone='America/Los_Angeles'; SELECT timestamp_sold FROM sales WHERE state_sold = 'CA' Why is this? TIMESTAMP values are...

Each server has a default global time_zone setting, configured by the owner of the server machine. You can find out the current time zone setting this way: SELECT @@time_zone Unfortunately, that usually yields the value SYSTEM, meaning the MySQL time is governed by the server OS's time zone sett...

To get a list of possible time_zone values in your MySQL server instance, use this command. SELECT mysql.time_zone_name.name Ordinarily, this shows the ZoneInfo list of time zones maintained by Paul Eggert at the Internet Assigned Numbers Authority. Worldwide there are appproximately 600 time z...

Javascript timestamps are based on the venerable UNIX time_t data type, and show the number of milliseconds since 1970-01-01 00:00:00 UTC. This expression gets the current time as a Javascript timestamp integer. (It does so correctly regardless of the current time_zone setting.) ROUND(UNIX_TIMEST...