Tutorial by Examples: l

List of commands that will be introduced here: ls #view contents of a directory touch #create new file mkdir #create new directory cp #copy contents of one file to another mv #move file from one location to another rm #delete a file or directory ls examples jennifer@my_co...

michael@who-cares:~$ The symbol ~ after the who-cares: is the current directory. ~ actually means the person's home directory. In this case, that's /home/michael. michael@who-cares:~$ cd Downloads michael@who-cares:~/Downloads$ Looks for Downloads in the current directory, then makes that th...

Elixir is available in main packages repository. Update the packages list before installing any package: emerge --sync This is one step installation: emerge --ask dev-lang/elixir

Install jekyll on Linux Mint 18 with the following steps: sudo apt install ruby sudo apt install build-essential sudo apt install ruby-dev sudo gem install jekyll

Open a command prompt with Administrator access Install Chocolatey: @powershell -NoProfile -ExecutionPolicy Bypass -Command "iex ((new-object net.webclient).DownloadString('https://chocolatey.org/install.ps1'))" && SET PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\bin Close the comm...

Encryption is used to transform data in its orignal format (Eg: The contents of a letter, Credentials part of authorizing a financial transaction) to something that cannot be easily reconstructed by anyone who is not intended to be part of the conversation. Basically encryption is used to preve...

Ionic Platform: Build, push, deploy, and scale your Ionic apps, the easy way. Title Description: The Ionic Platform is a cloud platform for managing and scaling cross-platform mobile apps. Integrated services enable you and your team to build, deploy, and grow your apps efficiently. Docume...

When a hit is sent to Google Analytics the data must be processed. Processing latency is 24-48 hours. This means that it can take time before you will see data under standard reports (Not real-time) any data that you do see may not be correct as it has probably not completed processing. Standard a...

A with_items loop in ansible can be used to easily loop over values. - name: Add lines to this file lineinfile: dest=/etc/file line={{ item }} state=present with_items: - Line 1 - Line 2 - Line 3

You can also loop over a variable list. From vars: favorite_snacks: - hotdog - ice cream - chips and then the loop: - name: create directories for storing my snacks file: path=/etc/snacks/{{ item }} state=directory with_items: '{{ favorite_snacks }}' If you are using Ansible ...

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...

To decouple and reuse the same error logging code for all your services you need two boilerplate classes and tuck them away in a library somewhere. ErrorhandlerAttribute implementing IServiceBehavior. FaultErrorhandler implementing IErrorhandler which logs all the exceptions. [AttributeUsage(Attr...

Modals slide in off screen to display a temporary UI, often used for login or signup pages, message composition, and option selection. import { ModalController } from 'ionic-angular'; import { ModalPage } from './modal-page'; export class MyPage { constructor(public modalCtrl: ModalControlle...

'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...

One of the great things about Ektorp, is that it provides ORM like functionality, straight out of the box. This example will walk you through creating a simple POJO and doing standard CRUD operation on it Creating a simple POJO First off, we define a POJO as follows import com.fasterxml.jackson...

Let's say we have multiple data sources which include database, file, prompt and argumentList. Depending on chosen source we change our approach: def loadData(dataSource: Symbol): Try[String] = dataSource match { case 'database => loadDatabase() // Loading data from database case 'file =&g...

The UWP applications can run in windowed mode and on several devices. They can be displayed on a wide range of screen sizes from low end phones to the huge surface hub screen. Using relative positioning will be enough for a lot of scenario but as the window size increases, it is always interesting t...

Sometimes you need to set the same data in many of your views. Using View::share // "View" is the View Facade View::share('shareddata', $data); After this, the contents of $data will be available in all views under the name $shareddata. View::share is typically called in a service p...

- (UIImage *)drawImageBySize:(CGSize)size quality:(CGInterpolationQuality)quality { UIGraphicsBeginImageContextWithOptions(size, NO, 0.0); CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetInterpolationQuality(context, quality); [self drawInRect: CGRectMake (0, 0...

We can add adaptivity to any subclass of UIView which we add on view controller in nib file. Lets take an example of adding adaptivity using size classes to a view. Add a view on view controller as: Now we need to pin this view to it's superview for fixing it's size and position using con...