Tutorial by Examples: s

This relies on the official consul docker image to run consul in clustered mode in a docker swarm with new swarm mode in Docker 1.12. This example is based on http://qnib.org/2016/08/11/consul-service/. Briefly the idea is to use two docker swarm services that talk to each other. This solves the pro...

This is example has extracted from this boilerplate. Custom middleware: export default function clientMiddleware() { return ({dispatch, getState}) => { return next => action => { if (typeof action === 'function') { return action(dispatch, getState); } ...

(Tested with ANTLR 4.5.3, Eclipse Neon, ANTLR 4 IDE 0.3.5, and Java 1.8) Download the latest ANTLR. Make sure to get the complete ANTLR Java binaries jar. Save to any appropriate location, for example the folder where other Java libraries are stored. It doesn’t matter where, just remember the loc...

The most basic case to lift a particular window above the others, just call the .lift() method on that window (either Toplevel or Tk) import tkinter as tk #import Tkinter as tk #change to commented for python2 root = tk.Tk() for i in range(4): #make a window with a label window = tk...

WordPress is applying pre_get_posts filter to literally any loop it generates. It means that all changes we are making in our callback function are applied to all exiting loops. Obviously it is not what we want in most scenarios. In most cases we would like to target only main loop, and only for n...

Analog to np.loadtxt, np.savetxt can be used to save data in an ASCII file import numpy as np x = np.random.random([100,100]) np.savetxt("filename.txt", x) To control formatting: np.savetxt("filename.txt", x, delimiter=", " , newline="\n", comment...

:!mkdir -p %:h to create the missing directories, then :w

Setting up the folders This example assumes code to be in src/ and the output to be put into out/. As such the folder structure should look something like example/ |-- src/ | |-- index.js | `-- ... |-- out/ `-- package.json Setting up the packages Assuming a setup npm environment, we...

Setup After setting up a simple project to use webpack, babel and react issuing $npm i -g webpack-dev-server will install the development http server for quicker development. Modifying webpack.config.js var path = require('path'); module.exports = { entry: './src/index.js', output: { ...

System Requirements: Node JS Getting Started First Go to Firebase Console and Create New Project. After Creating the project, in project click on settings icon besides project Name in left sidebar and select Permissions. On Permissions Page Click on Service accounts in left sidebar then c...

A cycle in a directed graph exists if there's a back edge discovered during a DFS. A back edge is an edge from a node to itself or one of the ancestors in a DFS tree. For a disconnected graph, we get a DFS forest, so you have to iterate through all vertices in the graph to find disjoint DFS trees. ...

STDDEV returns the sample standard deviation of expr, a set of numbers. You can use it as both an aggregate and analytic function. It differs from STDDEV_SAMP in that STDDEV returns zero when it has only 1 row of input data, whereas STDDEV_SAMP returns null. Oracle Database calculates the standard ...

Text box controls are typically used to accept input from the user. A text box control can accept one or more lines of text depending upon the settings of the TextMode attribute. Label controls provide an easy way to display text which can be changed from one execution of a page to the next. If you...

A check box displays a single option that the user can either check or uncheck and radio buttons present a group of options from which the user can select just one option. To create a group of radio buttons, you specify the same name for the GroupName attribute of each radio button in the group. If...

ASP.NET provides the following controls Drop-down list List box Radio button list Check box list Bulleted list These control let a user choose from one or more items from the list. List boxes and drop-down lists contain one or more list items. These lists can be loaded either by code or b...

A radio button list presents a list of mutually exclusive options. A check box list presents a list of independent options. These controls contain a collection of ListItem objects that could be referred to through the Items property of the control. Basic syntax of radio button list: <asp:RadioB...

The bulleted list control creates bulleted lists or numbered lists. These controls contain a collection of ListItem objects that could be referred to through the Items property of the control. Basic syntax of a bulleted list: <asp:BulletedList ID="BulletedList1" runat="server&quo...

pages = [] crawler = Anemone::Core.new(url, options) crawler.on_every_page do |page| results << page.url end crawler.run

Ionic inputs are no different from normal HTML inputs but they are styled differently and used as a directive. You can also use normal HTML inputs in Ionic apps. Here are some basic examples that Ionic offers ready-to-go. Checkbox: <ion-checkbox ng-model="checkbox">Label</ion-ch...

Ionic has it's own extension for displaying a modal window. Modals can be created by inserting the template straight to the view with a <script> tag or by using a separate template file. In this example we are assuming you have a html file named modal-template.html in a folder called templates...