Tutorial by Examples: o

adb is a command line tool for communicating with an emulator instance or connected device. It allows for installing and debugging apps, transferring files, as well as a variety of other interactions with the connected emulator or device. The ADB system consists of a client, which sends commands fro...

This function will display the error message supplied to it using the following error template: Path - application/errors/error_general.php The optional parameter $status_code determines what HTTP status code should be sent with the error. Syntax show_error($message, $status_code, $heading = '...

This function will display the 404 error message supplied to it using the following error template: Path - application/errors/error_404.php The function expects the string passed to it to be the file path to the page that isn't found. Note that CodeIgniter automatically shows 404 messages if cont...

This function lets you write messages to your log files. You must supply one of three "levels" in the first parameter, indicating what type of message it is (debug, error, info), with the message itself in the second parameter. Example: if ($some_var == "") { log_message('...

@Configuration public class AppSecurityConfig extends WebSecurityConfigurerAdapter { @Autowired DataSource dataSource; @Autowired public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception { auth.jdbcAuthentication().dataSource(dataSource) .pa...

The Hub The Hub is the main engine/central point of the entire configuration, point where all the nodes are connected. Hub should run only on a single machine. There should only be 1 hub running where all the tests are loaded. Tests will be run on the machines where hub is running, but you can...

Before setting up a Selenium grid you need to make sure you have Java installed and configured in your computer’s environment path. Configure the Hub Download latest stable Selenium Server version. Start the command prompt and navigate to the location in which you placed the Selenium server jar...

Nouns should always be singular. Be consistent with the nouns. For instance Find-Package needs a provider the noun is PackageProvider not ProviderPackage.

Person Microdata <section itemscope itemtype="http://schema.org/Person"> Hello, my name is <span itemprop="name">John Doe</span>, I am a <span itemprop="jobTitle">Graduate research assistant</span> at the <span itempr...

Locking on an stack-allocated / local variable One of the fallacies while using lock is the usage of local objects as locker in a function. Since these local object instances will differ on each call of the function, lock will not perform as expected. List<string> stringList = new List<st...

Detailed instructions on getting data-warehouse set up or installed.

When you get a working registry running you can pull or push images on it. For that you need the server.crt file into a special folder on your docker client. The certificate allows you to authenticate with the registry, and then encrypt communication. Copy server.crt from registry machine into /etc...

The continue statement in Objective-C programming language works somewhat like the break statement. Instead of forcing termination, however, continue forces the next iteration of the loop to take place, skipping any code in between. For the for loop, continue statement causes the conditional test a...

import socket import hashlib import os import time import itertools import threading import sys import Crypto.Cipher.AES as AES from Crypto.PublicKey import RSA from CryptoPlus.Cipher import IDEA #server address and port number input from admin host= raw_input("Server Address - &gt...

import time import socket import threading import hashlib import itertools import sys from Crypto import Random from Crypto.PublicKey import RSA from CryptoPlus.Cipher import IDEA #animating loading done = False def animate(): for c in itertools.cycle(['....','.......','..........'...

There are specific scenarios where in we might need to create a Quartz scheduler,based on user input on when a scheduler should be triggered,apart from we can handle cases,where we have certain pre-defined functionalities,which need to be triggered based on user action,at a certain period. This exa...

Especially in a ListView, you can run into performance problems by doing too many findViewById() calls during scrolling. By using the ViewHolder pattern, you can save these lookups and improve your ListView performance. If your list item contains a single TextView, create a ViewHolder class to stor...

Check the right software versions are installed: ansible >=2.0 python >=2.6 shade module for python $ansible --version ansible 2.2.0.0 $python --version Python 2.7.5 Install 'shade' the python component used to pilot openstack. $pip install shade Note : if you use a company...

Our openstack tenant is already set: a virtual lan gives instances private IP a virtual router map public IP to private IP a security key has been generated we have default firewall configuration for ssh and port 80 we are able to launch an instance thanks to the OpenStack web interface ...

Let use 'os_server' command from module 'Cloud' [http://docs.ansible.com/ansible/os_server_module.html]. Variables are defined in ./group_vars/all. $vi launch_compute.yml - name: launch a compute instance hosts: localhost gather_facts: False tasks: - name: Create and launch the VM ...