Error in PowerShell while using arrays

Question

While I am trying to assign a value to the specific index of an array it is showing the Errors. PS /home/mifi> $names = @()

PS /home/mifi> $names[1]="abc" Index was outside the bounds of the array. At line:1 char:1 + $names[1]="abc" + ~~~~~~~~~~~~~~~ + CategoryInfo : OperationStopped: (:) [], IndexOutOfRangeException + FullyQualifiedErrorId : System.IndexOutOfRangeException

pwsh -v
PowerShell v6.0.2

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Do you try the same with clean session? Show `$names.GetType().FullName`. Also, please, edit tags to match content of your question. — user4003407, Jun 07 '18 at 06:57

score 1 · Accepted Answer · answered Jun 07 '18 at 06:36

1

Thats because you have to initialize the array first. If you know the size of the array you can do it like this:

$arraySize = 10
$names= 1..$arraySize | foreach { $null }

Consider using a hashtable:

$names = @{}
$names[1] = "abc"

answered Jun 07 '18 at 06:36

Martin Brandl

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Your `$names` will not be array, when `$arraySize` is 1. Also with `$arraySize` equals to 0 it will create array with 2 elements. – user4003407 Jun 07 '18 at 06:38
@PetSerAl Good point, Keshav should keep that in mind. Depending on his requirements a hashtable would be preferable. – Martin Brandl Jun 07 '18 at 06:44
@Martin Brandl, It is still showing the error by using your above code and plus I have mentioned the version of the Powershell. – Keshav Maheshwari Jun 07 '18 at 06:52
@MartinBrandl actually I was using () instead of { } curly braises as it was mention in the older book to use ( ). – Keshav Maheshwari Jun 07 '18 at 07:05
We need to see your code but using @() will give you an array whereas @{} creates a hashtable. That are two different things – Martin Brandl Jun 07 '18 at 07:08

Error in PowerShell while using arrays

1 Answers1