Trim Values inside (one array inside (twoDimentionalArray)) - powershell

Question

I'm trying to remove the leading 0's in all values of an array within a two dimensional array.
Is there a library that can do this for me? I tried it with a foreach loop, but it only trims the current temp variable.
Here is the code:
[String[]]$arr1 = #('str1','str2','str3')
[String[]]$arr2 = #('str4','str5','str6')
[String[]]$arr3 = #('0str7')
[System.Object[]]$twoDimensionalArray = #()
[System.Object[]]$twoDimensionalArray += ,($arr1)
[System.Object[]]$twoDimensionalArray += ,($arr2)
[System.Object[]]$twoDimensionalArray += ,($arr3)
Write-Host "Removing leading zeros from array in twoDimentionalArray..."
ForEach ($strValue in $twoDimensionalArray[2])
{
$strValue = $strValue.TrimStart('0')
}
Write-Host "Leading zero's are removed."
Write-Host ""
Write-Host '$strValue =' $strValue
Write-Host '$twoDimensionalArray[2] =' $twoDimensionalArray[2]
Write-Host ""
Output (0str7)
Removing leading zeros from array in twoDimentionalArray...
Leading zero's are removed.
$strValue = str7
$twoDimensionalArray[2] = 0str7
Desired Output (str7)
Removing leading zeros from array in twoDimentionalArray...
Leading zero's are removed.
$strValue = str7
$twoDimensionalArray[2] = str7
Any ideas?

Answer 1

Here is the modified code snippet with the desired output. The trick is to modify the object itself:
[String[]]$arr1 = #('str1','str2','str3')
[String[]]$arr2 = #('str4','str5','str6')
[String[]]$arr3 = #('0str7')
[System.Object[]]$twoDimensionalArray = #()
[System.Object[]]$twoDimensionalArray += ,($arr1)
[System.Object[]]$twoDimensionalArray += ,($arr2)
[System.Object[]]$twoDimensionalArray += ,($arr3)
Write-Host "Removing leading zeros from array in twoDimentionalArray..."
[int] $arrayCounter = 0
ForEach ($strValue in $twoDimensionalArray[2])
{
$twoDimensionalArray[2][$arrayCounter] = $strValue.TrimStart('0')
$arrayCounter++
}
Write-Host "Leading zero's are removed."
Write-Host ""
Write-Host '$strValue =' $strValue
Write-Host '$twoDimensionalArray[2] =' $twoDimensionalArray[2]
Write-Host ""
I have tested this and it outputs str7 as you are expecting.

Answer 2

Edit all of the jagged array
This might be considered cheating and I don't know if you actual use case will abide by this but I tried to make it a little easier by using an array operator on this jagged array.
$twoDimensionalArray = $twoDimensionalArray | Foreach-object{
,($_ -replace "^0+")
}
This should save back to the original array $twoDimensionalArray. Using -replace save us running a separate loop to going inside the other array.
What this will do is use regex to replace all leading zeros from the array elements. Since the array would then be unrolled we still need the unary operator to ensure that the data is sent down the pipe as an array.
Depending on what control you have on your input this could be simplified as
$arr1 = #('str1','str2','str3')
$arr2 = #('str4','str5','str6')
$arr3 = #('0str7')
[string[]]$twoDimensionalArray = $arr1, $arr2, $arr3 | ForEach-Object{
,($_ -replace "^0+")
}
Edit only one element of the jagged array
Very simple change to get that running using the above logic.
$elementToChange = 2
$twoDimensionalArray[$elementToChange] = [String[]]#($twoDimensionalArray[$elementToChange] -replace "^0+")