Paired enumeration of two arrays [duplicate] - arrays

Question

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Powershell foreach regarding multiple collections
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Display multiple array values in list in Powershell
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Closed 3 months ago.
I have 2 arrays: I need to sort them in foreach to modify 1 file.
1 array with dbs name like:
$dbs = ['Honda', 'Toyota', 'BMW', 'Opel']
2nd array with their size like:
$dbsSize = ['123', '300', '222', '143']
and I can sort names in foreach like
foreach ($db in $dbs){
# some logic..
}
How can I sort 2nd array in the same foreach so I can use it in the same loop
Like this:
foreach ($db in $dbs) {
# some logic with $db
# and here I need some logic with $dbsSize
}
but to sort out $dbsSize like $dbs because I need the result like :
Honda
123
Toyota
300
etc.
Do I need to create another loop?

Answer 1

It seems to me you have two arrays where the indices determine which element of the one array belongs to the element in the other array.
It is unclear how you created them and why you did not create an array of objects with both properties together in the first place, but you can still do that like this:
$dbs = 'Honda', 'Toyota', 'BMW', 'Opel'
$dbsSize = '123', '300', '222', '143'
$result = for($i = 0; $i -lt [math]::Max($dbs.Count, $dbsSize.Count); $i++) {
[PsCustomObject]#{
Car = $dbs[$i]
Size = $dbsSize[$i]
}
}
# sort the items on 'Car' for instance
$result = $result | Sort-Object Car
# show on screen
$result
# save to structured CSV file you can open in Excel
$result | Export-Csv -Path 'X:\Somewhere\cars.csv' -UseCulture -NoTypeInformation
Result on screen using the above exampe looks like
Car Size
--- ----
BMW 222
Honda 123
Opel 143
Toyota 300

Answer 2

I don't see any sorting in your code, I only see enumeration. Seems like you want to enumerate both collections sequentially, in that case you would need to use a for loop instead of foreach:
$dbs = "['Honda', 'Toyota', 'BMW', 'Opel']" | ConvertFrom-Json
$dbsSize = "['123', '300', '222', '143']" | ConvertFrom-Json
for($i = 0; $i -lt [math]::Max($dbs.Count, $dbsSize.Count); $i++) {
$dbs[$i]
$dbsSize[$i]
}
If you want to use a foreach loop and both collections have the same Length, then you can get the items of one of them (your choice which) via indexing [ ]:
$i = 0
foreach($item in $dbs) {
$item
$dbsSize[$i++]
}
If you're looking to merge both arrays into objects, an easy way to do it is with the function from this answer, the usage in this case would be:
$dbs, $dbsSize | Join-Array -Columns Car, Size