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Introduction to PowerShell SubString

One of the most frequently performed operation or requirement with any language is the manipulation of strings. String functions are an integral part of PowerShell and there are various functions present to handle the string manipulation related tasks. In PowerShell, everything is an object and string is also an object of type System. String. A string is nothing, but a collection of characters enclosed within a single quote (‘’) or a double quote (“”). Substring is the part of any string or substring is nothing but a subset of a string. This article will cover in-depth about string in PowerShell, various functions that are available related to string operations, substrings, functions related to substring. The substring () is used to extract a part of a string and it is available for every string object in PowerShell.

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Operations available on a string object:

Before looking at the substring(), let’s see the list of operations that are available for any string object.

Input:

Output:

Some of the most commonly used operations are StartsWith, Remove, Split, Replace, Rim. The following is an example.

Example of PowerShell SubString

Input:

$test.ToLower()

Output:

Substring:

Syntax:

.Substring( StartIndex [, length] )

StartIndex: The position of the string from which the substring must be started. Usually, it should be 0 or greater than that and less than the length of the string.

Length: The length of the substring.

Use:

Used to fetch a portion of a string.

Example:

Input:

$test.Substring(10,7)

Output:

String concatenation:

In some cases, it is required to combine two strings. That is done with the help of ‘+’ operator.

Eg:

$string3

Output:

Input:

$string3=$string1 + $string2

Output:

In the above code if the variables are swapped before concatenation, then the error will not occur

Input:

Write-Host $string3

Output:

Other commonly used string functions:

.Split():

The is another method that can be used to split a string into substrings.

Syntax:

String -Split strSeparator [, MaxSubstrings] [, Options] String -Split {scriptblock} [, MaxSubstrings] -Split String

strSeparator: It is character of identification to split the string

MaxSubstrings: The maximum number of substrings that can be generated

Example:

Input:

$string.Split(“\”).Split(“-“)

Output:

Example:

Input:

This example will show how to split and generate substring based on regex and to split MAC addresses.

$test.Split(“.”)

Output:

Replace function:

When it comes to string, replacing a part of a string or substring is an integral operation. Always it is required by PowerShell users to find a text and replace it with some other piece of text. This is achieved by the.Replace() method.

Replace(strOldChar, strNewChar)

Stroldchar: Character to be found

Strnewchar: character to be replace the found text.

Example:

Input:

Write-Host “Text is replaced”

Output:

Example:

Write-Host “text in the file is replaced”

Output:

Comparison of strings:

The final method that we are going to see is the string comparison method. Most cases, it is required to compare strings and check if they are equal. This is done using the string compare method.

Example:

Input:

$test.CompareTo($test1)

Output:

Conclusion

Thus, the article covered string operations and substring in detail. It covered in detail the substring method in PowerShell, along with various methods of extracting a substring from a string in different ways. It also covered various string methods like string concatenation, string comparison, string replace, etc. The best way to learn more about this would be to try other various methods and practice them in sample scripts.

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This is a guide to PowerShell SubString. Here we discuss the Introduction, list of operations, and examples with code implementation respectively. You may also have a look at the following articles to learn more –

You're reading Guide To Substring Method In Powershell

How Scrollleft Method Works In Jquery

Introduction to jQuery scrollLeft

The jQuery scrollLeft is the element to slide the application page from left to right. It is the function to roll the display screen horizontally to show the application information easily. It is the jQuery event to move the button left to the right side and display the web application data. It is the trigger function to place the left side and move horizontally to display hiding data. It is a button placed on the left side of the web application and slide toward the right side to display all web information.

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Syntax

Given below is the syntax mentioned:

$("SELECTOR of application").scrollLeft();

Explanation:

The scrollLeft() method is using for horizontal roller using jQuery.

The $(” SELECTOR of application “) is using for select the class, id, tags like h1, div, .class, and #id.

$("SELECTOR of application").scrollLeft(select position range);

Explanation:

The scrollLeft(select position range) is using for the place button as per the user’s required position.

The position is the place where the button is displayed and starts rolling horizontally.

With button triggered syntax is below.

$(“h1”).scrollLeft(50); }); The Information of the web application.

Explanation:

The scrollLeft() method is place inside of the script tag in the htmlpage.

The web application body part and selector are placed inside of the body part in the HTML page.

How scrollLeft Method Works in jQuery?

To jQuery scrollLeft user either download the jQuery library or use jQuery CDN version link.

The jQuery latest version place inside of the html page.

The jQuery link is below:

The html page is created with filename and .html extension.

Example:

jqueryscroll.html

The add script tag inside of a head section of the HTML page.

Jquery scroll left syntax with required functions.

Syntax placed inside of the script tag.

$("p").scrollLeft(50);

Write required code inside of the body tag.

Write required code inside of the p tag.

Combine the all procedure together to get jQuery scrollLeft.

$(document).ready(function(){ $(“p”).scrollLeft(); }); p{ border: 5px solid darkgrey; width: 150px; overflow: auto; } The jqueryscrollleftis elementtoslide theapplicationpagefrom lefttoright.

Examples

Given below are the examples mentioned:

Example #1

The basic jQuery scrollLeft example and output.

Code:

$(document).ready(function(){ $(“p”).scrollLeft(); }); p{ border: 5px solid darkgrey; width: 150px; overflow: auto; } The jqueryscrollleftis elementtoslide theapplicationpagefrom lefttoright. The jqueryscrollleftis functiontorollthe displayscreenhorizontallytoshowthe applicationinformationeasily.

Output:

Explanation:

The scrollLeft() method used inside of the jQuery function using selector (“p”).

The horizontal bar display in the output is known as a jQuery scrollLeft.

Example #2

Code:

$(document).ready(function(){ $(“p”).scrollLeft(80); }); p{ border: 5px solid darkgrey; width: 120px; overflow: auto; } The jqueryscrollleftis elementtoslide theapplicationpagefrom lefttoright. Thejqueryscrollleftisfunctiontorollthedisplayscreenhorizontallytoshowthe applicationinformationeasily.

Output:

Explanation:

The scrollLeft(80) method used inside of the jQuery function with selector (“p”).

The horizontal bar displays in the output with some space from the left side.

The scroll bar set the position (80) with method.

Example #3

With button example and output.

Code:

$(document).ready(function(){ $(“p”).scrollLeft(80); }); }); p{ border: 5px solid darkgrey; width: 120px; overflow: auto; } The jqueryscrollleftis elementtoslide theapplicationpagefrom lefttoright. Thejqueryscrollleftisfunctiontorollthedisplayscreenhorizontallytoshowthe applicationinformationeasily.

Output:

Explanation:

The scrollLeft(80) method used inside of the jQuery function with selector (“p”).

The triggered function used with the button and set the position.

Example #4

With vertical scroll example and output.

$(document).ready(function(){ $(“p”).scrollLeft(80); }); }); p{ border: 5px solid darkgrey; height: 80px; width: 120px; overflow: auto; } The jqueryscrollleftis elementtoslide theapplicationpagefrom lefttoright. Thejqueryscrollleftisfunctiontorollthedisplayscreenhorizontallytoshowthe applicationinformationeasily.

Output:

Explanation:

The scrollLeft(80) method used inside of the jQuery function with selector (“p”).

The width and height are set with some required style and placed inside the head tag.

The vertical and horizontal jQuery scroll display in the output.

Example #5

With image example and output.

Code:

$(document).ready(function(){ $(“p”).scrollLeft(80); }); }); p{ border: 5px solid darkgrey; height: 250px; width: 250px; overflow: auto; background-color: yellow; } The jqueryscrollleftis elementtoslide theapplicationpagefrom lefttoright. Thejqueryscrollleftisfunctiontorollthedisplayscreenhorizontallytoshowthe applicationinformationeasily.

Output:

Explanation:

Method used inside of the jQuery function with selector (“p”).

The triggered function is used with the button and sets the position of the scroll button.

The images, tables, multiple functions, and information can display.

In the above output, you can show the web data and image and display.

Conclusion

It is an adjustable, user-friendly, and attractive function of the web application. It is making space-saving, elegant, and readable websites, and web applications. It is a horizontal scrollbar to display maximum information into minimum space in the websites. It is an important function for the navigation bar, thumbnail, and multiple tables in the web applications.

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This is a guide to jQuery scrollLeft. Here we discuss the introduction, how scrollLeft method works in jQuery? and examples respectively. You may also have a look at the following articles to learn more –

How To Update Powershell On Windows 11

By default, Windows 11 comes with the latest Powershell 5.1 preinstalled. But you’d be surprised that Microsoft has also released a cross-platform Powershell Core (version 7.x) with extensive features.

Indeed, Powershell is popular among developers, system administrators, and even beginners, thanks to its easy-to-learn lightweight cmdlets. Thus, if you prefer this command-line interface, you’d definitely want to get your hands on its latest version.

Updating or installing the latest Powershell version is relatively easy. You can do it using the MSI package, Zip package, command lines, or even from the Microsoft Store!

Updating or migrating Powershell to 7.x requires manual installation. Once you’ve migrated to the core version, it runs side-by-side with the built-in Windows Powershell.

The open-source software holds features that might be lacking in the 5.1 version, like Automatic Pipeline Parallelization, Null conditional operators, and more. It also supports Docker containers, Defaults to UTF-8 encoding, Powershell Remoting over SSH, etc.

The product works only on those computers running Windows 10 version 17763.0 and higher. So, if you’re running an older Windows generation, it’s only possible to update your Windows Powershell to 5.1.

Now, without further delay, let’s jump into the four different ways to update Powershell on Windows 11.

Microsoft Store is the gateway to installing Windows applications and programs on your computer. Therefore, this platform is the simplest method to get the latest version, 7.3. Kindly follow the below instructions on how to update Powershell from the Microsoft Store:

In the search bar, type Powershell.

Note: Usually, Powershell Core gets updated automatically. If, for some reason, there’s a pending update, you can open the Microsoft Store app and hit the Update button to complete it.

Another way you can update Powershell is by downloading and installing the MSI Package from the official Microsoft website. Go through the following steps to do just that:

Get to the Installing the MSI package section on the website.

You can also install the MSI package or a zip folder from Github. All you have to do is navigate to the Assets section and download the latest version available (7.3.0).

Also, you can directly update or install Powershell Core from the command line interface. This way, you do not have to visit any online page to download the latest version on Windows. Regarding the same, here’s a quick guide that should help you:

In the User Account Control prompt, hit the Yes button.

Again, wait for the installation to complete.

Now, you can open the Run utility and execute the pwsh command to launch the Powershell Core application.

Note: To run Powershell 7.x on Windows Powershell, kindly execute the pwsh cmdlet. To get back to the 5.1 version, simply run the exit command. However, as discussed above, you need to have the version installed on your PC.

One of the easiest ways to launch Windows Powershell is from the Quick Link menu. Simply picking the Windows Terminal would open the utility. 

Certainly, you want the updated version (Powershell Core) to get open instead of the classic Windows Powershell. To make this change, you’re required to make the version 7 interface your default terminal:

Use the Windows + E hotkey to open File Explorer.

Static Variable In Java: What Is Static Block & Method

The static can be:

Let’s look at static variables and static methods first.

What is Static Variable in Java?

Static variable in Java is variable which belongs to the class and initialized only once at the start of the execution. It is a variable which belongs to the class and not to object(instance ). Static variables are initialized only once, at the start of the execution. These variables will be initialized first, before the initialization of any instance variables.

A single copy to be shared by all instances of the class

A static variable can be accessed directly by the class name and doesn’t need any object

Syntax:

What is Static Method in Java?

Static method in Java is a method which belongs to the class and not to the object. A static method can access only static data. It is a method which belongs to the class and not to the object(instance). A static method can access only static data. It cannot access non-static data (instance variables).

A static method can call only other static methods and can not call a non-static method from it.

A static method can be accessed directly by the class name and doesn’t need any object

A static method cannot refer to “this” or “super” keywords in anyway

Syntax:

Note: main method is static, since it must be accessible for an application to run, before any instantiation takes place.

Lets learn the nuances of the static keywords by doing some excercises!

Example: How to call static variables & methods

Lets learn the nuances of the static keywords by doing some excercises!

Step 1) Copy the following code into a editor

public class Demo{ public static void main(String args[]){ Student s1 = new Student(); s1.showData(); Student s2 = new Student(); s2.showData(); } } class Student { int a; static int b; Student(){ b++; } public void showData(){ System.out.println("Value of a = "+a); System.out.println("Value of b = "+b); } }

Step 2) Save & Compile the code. Run the code as, java Demo.

Step 3) Expected output show below

Following diagram shows, how reference variables & objects are created and static variables are accessed by the different instances.

Value of a = 0 Value of b = 1 Value of a = 0 Value of b = 2 Value of a = 0 Value of b = 3 error: non-static variable a cannot be referenced from a static context a++;

What is Static Block in Java?

The static block is a block of statement inside a Java class that will be executed when a class is first loaded into the JVM. A static block helps to initialize the static data members, just like constructors help to initialize instance members.

class Test{ static { } }

Following program is the example of java static block.

Example: How to access static block public class Demo { static int a; static int b; static { a = 10; b = 20; } public static void main(String args[]) { System.out.println("Value of a = " + a); System.out.println("Value of b = " + b); } }

you will get following output of the program.

Value of a = 10 Value of b = 20

 

Basics Of Windows Powershell Script

Basics Of Windows PowerShell Script

PowerShell Script consists of commands that are called cmdlets. The cmdlets let you access data stores such as certificate and registry stores like file systems. Putting in simple words, using this very rich Scripting language, you can do almost any task that you do on Graphical User Interface (GUI)

What is the need for PowerShell Script when there is already a command prompt?

If you have just come across Windows PowerShell Script, you might be wondering that how is PowerShell Script any different from Command Prompt?

In the blog that follows, you shall also see how you can create a PowerShell Script

How to create a PowerShell Script?

There are two ways using which you can create PowerShell Script

You can write PowerShell Script using the notepad editor or

You can use Integrated Scripting Environment or ISE to create PowerShell Scripts

1. To write PowerShell Script Using Notepad

Step 1:

Step 2:

Once you opened the Notepad, type or paste your text (which is known as the Script). For e.g. Type, This is my first Script

Step 3:

Follow the path mentioned below –

In the File name suffix name with .ps1.

For e.g. sample_Script.ps1 and hit Save button

2.  To Create Windows PowerShell Script Using Integrated Scripted Environment (ISE) What is an ISE?

ISE short for integrated scripting environment is an editor where you will run, test and debug scripts. In simple terms, it is a console where you run commands. As shown in the figure above it consists of 3 parts namely –

Script Interface

PowerShell Console

Command Module

Note: Once you write a PowerShell Script in a script interface, it gets executed in PowerShell Console once you press F5 button.  

Step 1:

Go to search bar and type Windows Powershell

Step 2:

Now you will find Run as Administrator

Step 3:

Type a text in the window that opens. For e.g. This is my first PowerShell Script

Step 4:

Save the file with the suffix the file name with .ps1

Executing the Windows PowerShell Script

Now after you have created the file, it’s time to run that file. For this, you will first have to change the execution policy. What this will do is that it will allow Scripts to run. It is very crucial to note is that there are four execution policies namely (please write these as mentioned below) –

RemoteSigned

Scripts created on the device are run. If you wish to run scripts on another device, these scripts would require a signature from a trusted publisher.

Restricted

This command, as the name suggests will stop any script from being executed.

AllSigned

This command permits all scripts to be executed on a condition that they are signed by a trusted publisher.

Unrestricted

This command runs all the scripts without any restriction.

Let’s try and execute a sample Windows PowerShell Script. To do this –  

Step 1:

In the search bar type PowerShell and then choose the Run as Administrator option

Step 2:

Type the below-mentioned command in the PowerShell Script editor:

Set-ExecutionPolicy RemoteSigned

Step 3:

Then type “A” and press enter

Step 4:

Type the following command in the Windows PowerShell Script editor and press enter

C:Userssarang.bhargavaDesktopSample Script.ps1

Cmdlet – An Overview

Once you have assigned the execution policy, you might as well want to try some useful PowerShell Script. Here are some of the important points with regards to cmdlets.

Cmdlets are a combination of a verb and a noun separated by a hyphen (which is also the syntax). When you type verb and place a hyphen ‘-’ after that, you will get options for noun.

Syntax: “verb-noun”. E.g. Get-Certificate

Some of the common types of Cmdlets are

Start: Run a command

Get: Get something out of a command

Stop: To stop command from running

Set: Use to define

New: when you want to create something new

Out: This is used to give an output

There are 3 types of cmdlets

System

User

Custom cmdlets

Cmdlets outputs results as an array of objects

Cmdlets are case-insensitive. Which means wither you write Set-Alias or set-alias, it is one in the same thing.

To Sum Up

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Sarang Bhargava

Does Static Factory Method Internally Use New Keyword To Create Object In Java?

Factory pattern is a design pattern (creational pattern) which is used to create multiple objects based on the data we provide. In it we create an object abstracting the process of creation.

Example

Below given is the example implementation of the factory pattern. Here, we have an interface with name Employee and 3 classes: Student, Lecturer, NonTeachingStaff, implementing it. We have created a factory class (EmployeeFactory) with a method named getEmployee(). This method accepts a String value and returns an object of one of the classes, based on the given String value.

import java.util.Scanner; interface Person{    void dsplay(); } class Student implements Person{    public void dsplay() {       System.out.println("This is display method of the Student class");    } } class Lecturer implements Person{    public void dsplay() {       System.out.println("This is display method of the Lecturer class");    } } class NonTeachingStaff implements Person{    public void dsplay() {       System.out.println("This is display method of the NonTeachingStaff class");    } } class PersonFactory{    public Person getPerson(String empType) {       if(empType == null){          return null;       }       if(empType.equalsIgnoreCase("student")){          return new Student();       } else if(empType.equalsIgnoreCase("lecturer")){          return new Lecturer();       } else if(empType.equalsIgnoreCase("non teaching staff")){          return new NonTeachingStaff();       }       return null;    } } public class FactoryPattern {    public static void main(String args[]) {       Scanner sc = new Scanner(System.in);       System.out.println("Enter the type of the object you want: (student, lecturer, non teaching staff)");       String type = sc.next();       PersonFactory obj = new PersonFactory();       Person emp = obj.getPerson(type);       emp.dsplay();    } } Output Enter the type of the object you want: (student, lecturer, non teaching staff) lecturer This is display method of the Lecturer class Static factory method

Though it is said that there are five ways to create an object in Java namely −

Using the new keyword.

Using the Factory method.

Using cloning.

Using Class.forName().

Using object deserialization.

The only way to create an object in Java is using the new keyword all other ways are abstractions to it. Intact all these methods internally use the new keyword.

Example import java.util.Scanner; interface Employee{    void dsplay(); } class Student implements Employee{    public void dsplay() {       System.out.println("This is display method of the Student class");    } } class Lecturer implements Employee{    public void dsplay() {       System.out.println("This is display method of the Lecturer class");    } } class NonTeachingStaff implements Employee{    public void dsplay() {       System.out.println("This is display method of the NonTeachingStaff class");    } } class EmployeeFactory{    public static Employee getEmployee(String empType) {       if(empType == null){          return null;       }       if(empType.equalsIgnoreCase("student")){          return new Student();       } else if(empType.equalsIgnoreCase("lecturer")){          return new Lecturer();       } else if(empType.equalsIgnoreCase("non teaching staff")){          return new NonTeachingStaff();       }       return null;    } } public class FactoryPattern {    public static void main(String args[]) {       Scanner sc = new Scanner(System.in);       System.out.println("Enter the type of the object you want: (student, lecturer, non teaching staff)");       String type = sc.next();       EmployeeFactory obj = new EmployeeFactory();       Employee emp = EmployeeFactory.getEmployee(type);       emp.dsplay();    } } Output Enter the type of the object you want: (student, lecturer, non teaching staff) lecturer This is display method of the Lecturer class

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