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Computer

Programming

For Beginners

Quick Start Guide

Tutorial Book 3

Ray Yao

Copyright 2015 by Ray Yao

All Rights Reserved

Neither part of this book nor whole of this book may be reproduced or transmitted in any form or by any means electronic, photographic or mechanical, including photocopying, recording, or by any information storage or retrieval system, without prior written permission from the author . All rights reserved !

Ray Yao

About the Author: Ray Yao

Certified PHP engineer by Zend, USA

Certified JAVA programmer by Sun, USA

Certified SCWCD developer by Oracle, USA

Certified A+ professional by CompTIA, USA

Certified ASP . NET expert by Microsoft, USA

Certified MCP professional by Microsoft, USA

Certified TECHNOLOGY specialist by Microsoft, USA

Certified NETWORK+ professional by CompTIA, USA

www . amazon . com/author/ray-yao

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Preface

Computer Programming covers all essential computer language knowledge . You can learn complete primary skills of computer programming fast and easily .
The book includes six crash courses, such as PowerShell, Node.js, Django, Scala, Swift, Perl.

Note:

This book is only for computer programming beginners, it is not suitable for experienced computer programmers .

Source Code for Download

This book provides source code for download; you can download the source code for better study, or copy the source code to your favorite editor to test the programs .

Table of Contents

PowerShell

Hour 1

Introduction

What is PowerShell?

PowerShell is a command-line script environment running on a Windows machine for automate system and application management . You can think of it as an extension of the command line prompt cmd . exe . PowerShell is built on the . net platform, and all that are passed by the command are . net objects . PowerShell fully supports the use of objects . It is readable, easy to use, and powerful . From Window 7 to now, various operating systems have built-in PowerShell platforms .

Currently there are five versions of PowerShell:

Operating Systems	Versions:
Windows Vista or Windows Server 2008	PowerShell . 0
Windows 7 or Windows Server 2008 R2	PowerShell . 0
Windows 8 or Windows Server 2012	PowerShell . 0
Windows . 1 or Windows Server 2012 R2	PowerShell . 0
Windows 10 or Windows Server 2016	PowerShell . 0

On August 18, 2016, Microsoft announced that the open source, cross-platform version of PowerShell will support multiple operating systems including Windows, MacOS, CentOS and Ubuntu . It is called PowerShell Core and runs on . net Core .

Start PowerShell

Method 1:

Click Start > Windows PowerShell

Method 2:

Click Start > Type PowerShell in the Search field .

Method 3:

Click Start > Type PowerShell in the Run field .

Method 4:

Click Start > All Programs > Accessories > Windows PowerShell .

After you start the PowerShell, you can see a blue screen .

PowerShell Commands

The format of Powershell command is verb - noun.

The syntax to check the PowerShell commands is as follows:

Get-Command

Example 1.1

PS C:\Users\RAY> Get-Command CommandType Name ----------- ---- Alias Add-ProvisionedAppxPackage Alias Apply-WindowsUnattend

Explanation:

CommandType: There are three command types in PowerShell:

1 . Alias: another name of the command .

2 . Function: the command is used for a function .

3 . Comlet: a powerful PowerShell command, its parameter is a . net object .

Note:

. For easier reading, we will omit PS C:\Users\RAY> in later page s .

. The PowerSell commands will be shown in bold type in later page s .

Get Command Alias

The syntax to get the command alias is as follows:

Get-Command -CommandType Alias

Example 1.2

Get-Command -CommandType Alias CommandType Name ----------- ---- Alias % - > ForEach-Object Alias ? - > Where-Object Alias ac - > Add-Content ..

Explanation:

The alias of the ForEach-Object is %.

The alias of the Where-Object is ?

The alias of the Add-Content is ac

By the way, the alias of the Get-Command is gcm.

Note:

. For easier reading, we will omit PS C:\Users\RAY> in later page s .

. The PowerSell commands will be shown in bold type in later page s .

Get Commands with Verb

The syntax to get some commands with the specified verb is as follows:

Get-Command verb Specified-Verb

Example 1.3

Get-Command -verb Clear CommandType Name ----------- ---- Function Clear-BitLockerAutoUnlock Function Clear-Disk Function Clear-DnsClientCache Function Clear-FileStorageTier Function Clear-Host Function Clear-StorageDiagnosticInfo Cmdlet Clear-Content Cmdlet Clear-EventLog Cmdlet Clear-History

Explanation: Get-Command -verb Clear gets the commands with Clear verb.

Get Commands with Noun

The syntax to get some commands with specified noun is as follows:

Get-Command -noun Specified-Noun

Example 1.4

Get-Command -noun Service CommandType Name ----------- ---- Cmdlet Get-Service Cmdlet New-Service Cmdlet Restart-Service Cmdlet Resume-Service Cmdlet Set-Service Cmdlet Start-Service Cmdlet Stop-Service Cmdlet Suspend-Service

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