PowerShell Array

 Array in PowerShell


The array is a type of data structure that can be used to 
store a collection of items, the collection of items can 
be either of the same datatype or different. 

The elements in an array can be accessed using 
the index. The index of the array usually starts at 0 just 
like other programming languages, so to access the first element, use index [0]. 

Define Array in PowerShell

Array in PowerShell can be defined in multiple 

ways.

  1. To create and initialize an array, assign comma separated multiple values to a variable. 
  2. Pass values to variable within bracket  beginning with @ like $var = @()


When no data type is specified, PowerShell creates each array as an object array (System.Object[]).


    3. We can create array to hold value of specific type also, like below



How to access an Array

We can refer to an array by using its variable name. To display all the elements in the array, type the array name.


We can also refer to the elements in an array by using an index, beginning at position 0. Enclose the index number in brackets. For example, to display the first element in the $arrayvar2 array


We can also get part of array using range operator, like below:
$arrayvar2[0..2] return first to third element from array.

Operations on Array


To get the properties and methods of an array, such as the Length property and the SetValue method, use the InputObject parameter of the Get-Member cmdlet.


Get element count of Array

Get how many values are stored in array, use Length or its alias property Count.



Add element to Array

We can add new values to array using “+=“ operator, Like below

Update element of Array

We can update elements of array using index. Like below

Sorting of Array elements

sort operator can be used to sort the elements of an array

Looping over Array elements

for and foreach loop can be used to iterate over array.


For Video: 



Comments

Post a Comment

Popular Posts

How to Import and Export Delimited Files, like CSV, in PowerShell

Image
In this tutorial, we will see how we can use PowerShell to import and export CSV file's data. Managing CSV Files using Import/Export-CSV in PowerShell We have two important cmdlets import-csv/export-csv which are widely used while working with CSV. Before moving to how to manage these type of files, First look at what is CSV file: A Comma Separated Values ( CSV ) file is a plain text file that contains a list of data. These files are often used for exchanging data between different applications. For example, databases and contact managers often support CSV files. A CSV file has a fairly simple structure. It’s a list of data separated by commas as you can see in below screenshot. We have file "email.csv" having email address and name separated by comma. You can use notepad/excel to open thses file. Now lets move back to our main topic, how to manage csv files with PowerShell.  Reading CSV Files with Import-Csv Importing of csv file is pretty straight forward. First move to
Read more

PowerShell Arithmetic Operators

Image
In this tutorial we will see about PowerShell Arithmetic Operators and how PowerShell is dealing with them. Arithmetic operators are used to perform numeric calculations. As well as numeric calculations, the addition operator may also be used with strings, arrays, and hashtables. Multiplication operator may also be used with strings and arrays. Below is the list of PowerShell arithmetic operators. Operator Description Example + Adds numeric values 4 + 6 concatenates a string, arrays, and hash tables “CS” + “Tutorials” – Subtracts numeric values 4 – 2 Makes a number negative -98 * Multiple numeric values 4 * 2 copy string, arrays to the specified number of times “!” * 4 / Divides numeric values 4 / 2 % Gives remainder after division 7 % 3 For live demo, watch below video. I have demonstrated the use of PowerShell arithmetic operators by  creating calculator. Along with operators, Switch statement and While loop also used.  
Read more

How to generate a GUID in PowerShell

Image
 If you ever need a unique id in your script, you can create GUID (globally unique identifier) In PowerShell 4.0 and earlier you can use [guid] class with its static method. In PowerShell 5.0 and later, you can use New-Guid cmdlet: You can use Get-Member to know its object type. You can also store GUID into a variable like below If you want to get GUID as string, use ToString  method or Guid  property. Both return output of string type, you can verify this using Get-Member .
Read more