Tutorial by Examples: ed

with_items - predefined dictionary

It is possible to create more complex loops with dictionaries. From vars: packages: - present: tree - present: nmap - absent: apache2 then the loop: - name: manage packages package: name={{ item.value }} state={{ item.key }} with_items: '{{ packages }}' Or, if you don't like ...

ansible • Ansible: Looping

Nested loops

You can create nested loops using with_nested. from vars: keys: - key1 - key2 - key3 - key4 then the loop: - name: Distribute SSH keys among multiple users lineinfile: dest=/home/{{ item[0] }}/.ssh/authorized_keys line={{ item[1] }} state=present with_nested: - [ 'calvin...

ansible • Ansible: Looping

Full commented example

'use strict'; import React, {Component} from 'react'; import ReactNative from 'react-native'; const { AppRegistry, StyleSheet, Text, View, Navigator, Alert, TouchableHighlight } = ReactNative; //This is the app container that contains the navigator stuff class AppC...

react-native • Navigator with buttons injected from pages

Getting Started with FirebaseUI

FirebaseUI offers Android, iOS, and Web clients. You can get started with them like so: Android: // app/build.gradle dependencies { // Single target that includes all FirebaseUI libraries compile 'com.firebaseui:firebase-ui:0.5.2' // FirebaseUI Database only compile 'com.f...

firebase • FirebaseUI

Animated Alerts

The .fade and .in classes adds a fading effect when closing the alert message. <div class="alert alert-success fade in"> <a href="#" class="close" data-dismiss="alert" aria-label="close">&times;</a> <strong>Succ...

twitter-bootstrap • Alert

Hello World Firebase Realtime Database in Node

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...

firebase • Using Firebase with Node

Detecting a cycle in a directed graph using Depth First Traversal

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. ...

algorithm • Graph

Bulleted lists and Numbered lists

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...

ASP.NET • ASP.NET - Basic Controls

Edit row details

Working jsBin <!DOCTYPE html> <html> <head> <base href="https://polygit.org/polymer+:master/iron-data-table+Saulis+:master/components/"> <link rel="import" href="polymer/polymer.html"> <script src="webcom...

polymer • iron-data-table

Edit row details using sub-element

This example uses a separate element to edit bound data to the row-detail template. Working jsBin <!DOCTYPE html> <html> <head> <base href="https://polygit.org/polymer+:master/iron-data-table+Saulis+:master/components/"> <link rel="import&q...

polymer • iron-data-table

Simple Dockerfile

# Base image FROM python:2.7-alpine # Metadata MAINTAINER John Doe <[email protected]> # System-level dependencies RUN apk add --update \ ca-certificates \ && update-ca-certificates \ && rm -rf /var/cache/apk/* # App dependencies COPY requirements....

Docker • Dockerfile contents ordering

Getting Started with OpenCV 3.1 on Windows

We install OpenCV 3.1.0 on Windows and get started. There are two ways to install OpenCV on windows. One is to download the installer and run it. Other is to build from source. This is the easiest way to install OpenCV and get started. OpenCV gives pre-build binaries to install on Windows here. Aft...

opencv • Getting started with opencv

Create Dialog in Ionic

// An alert dialog $scope.showAlert = function() { var alertPopup = $ionicPopup.alert({ title: 'Don\'t eat that!', template: 'It might taste good' }); alertPopup.then(function(res) { console.log('Hello your first example.'); }); }; });

ionic-framework • Create Dialog in Ionic

Retrieve an ID of newly created item in SharePoint list

This example shows how to retrieve an ID of a newly created item using SharePoint REST API. Note : listName - This variable contains name of you list. newItemBody - This will be your request body for adding new item in list. e.g. var newItemBody = { __metadata: { 'type': 'SP.Data.MyListNameIte...

sharepoint • REST Services

Using a named let

A normal let form binds each value to its corresponding identifier, before executing the body. With a "named let", the body can then recursively be re-executed, passing a new value for each identifier. #lang racket (let sum-of-list ([l '(1 2 3)]) (if (null? l) 0 (+ (car ...

racket • Recursion

"multi" Parameter while updating multiple documents

To update multiple documents in a collection, set the multi option to true. db.collection.update( query, update, { upsert: boolean, multi: boolean, writeConcern: document } ) multi is optional. If set to true, updates multiple documents that meet the query crit...

MongoDB • CRUD Operation

Edit a regular expression in Ex mode

Suppose you are searching for a Title Case pattern in a large text file and you want to edit a incorrect regular expression: First, go into Ex mode by typing q: You will now see all the commands that you typed in commandline mode, press j to go the regular expression you want to edit (/\v[A-Z]\w...

vim • Regular expressions in Ex Mode

Joined inheritance strategy

A Sample class diagram based on which we will see JPA implementation. @Entity @Table(name = "VEHICLE") @Inheritance(strategy = InheritanceType.JOINED) @DiscriminatorColumn(name = "VEHICLE_TYPE") public abstract class Vehicle { @TableGenerator(name = "VEHICLE_GE...

jpa • Joined Inheritance strategy

How to share data across multiple devices in Win10 UWP App

To make an app more cohesive, we often need to keep user's personal settings and preferences consistent across multiple devices that have been logged in with one Microsoft account. In this sample, we use roaming data to store and to load UI settings, game process and user info. But the roaming data ...

uwp • Working with Filesystem

How to connect Realtime database with Android Application

How to implement FirebaseRealTime database in android application. Following is the steps for do it. First install firebase sdk, If you dont know how to install then following is the URL for help. Install Firebase SDK After thet register your project in firbase console, URL of the firbas...

firebase • Firbase Realtime Database with Android