How to construct an array of arrays with Powershell? [duplicate] - arrays

Question

This question already has answers here:
Powershell Multidimensional Arrays
(11 answers)
Closed 3 years ago.
To group data, every time there's a "new person" as below, I want to add their info to that temporary array and reset that array to null.
Before each "new person" array is set to null, I want to add that array to an array of people. An array of arrays.
How can I add one array into another?
$people = import-csv "./people.csv"
$h = #{}
$h.gettype()
$all_people
ForEach ($person in $people) {
$new_person
if ($person -match '[0-9]') {
Write-host $person
}
else {
write-host "new person"
write-host $person
}
}
output:
thufir#dur:~/flwor/people$
thufir#dur:~/flwor/people$ pwsh foo.ps1
IsPublic IsSerial Name BaseType
-------- -------- ---- --------
True True Hashtable System.Object
new person
#{people=joe}
#{people=phone1}
#{people=phone2}
#{people=phone3}
new person
#{people=sue}
#{people=cell4}
#{people=home5}
new person
#{people=alice}
#{people=atrib6}
#{people=x7}
#{people=y9}
#{people=z10}
thufir#dur:~/flwor/people$
I have something like this:
$people = import-csv "./people.csv"
$all_people
$new_person = "new","person"
$new_person.GetType()
ForEach ($person in $people) {
if ($person -match '[0-9]') {
Write-host $person
$new_person.Add($person)
}
else {
write-host "new person"
write-host $person
#$new_person = null
$new_person = "new","person"
}
}

Answer 1

Powershell doesnt provide a good functionality to create an array of array with use of basic arrays.
What you can do use use an array of hashtable or PsCustomObjects to create yourself an array of arrays.

Answer 2

Yes you can create array of arrays.
Example we create 3 arrays like
$a = 1..5
$b = 6..10
$c = 11..15
Now we can add them in another array $d
$d = $a,$b,$c
Now we can access them like:
$d[0]
# Output
# 1
# 2
# 3
# 4
# 5
$d[0][2]
# Output is $a arrays 3rd element