So I have
Array = [testfile001_TR1,
testfile001_TR2,
testfile001_TR3,
testfile002_TR1,
testfile002_TR2,
testfile002_TR3]
I would like to split the above Array into multiple arrays
Array[0] = testfile001_tr1,testfile001_tr2,testfile001_tr3
Array[1] = testfile002_tr1,testfile002_tr2,testfile002_tr3
Splitting an array into two arrays (collections) by a given criterion can be achieved with the .Where() array method:
$array =
'testfile001_TR1',
'testfile001_TR2',
'testfile001_TR3',
'testfile002_TR1',
'testfile002_TR2',
'testfile002_TR3'
# Note: $coll1 and $coll2 aren't technically *arrays*, but for
# most purposes behave like ones.
$coll1, $coll2 = $array.Where({ $_ -like 'testfile001*' }, 'Split')
Efficiently splitting into multiple collections requires extra work, using a switch statement and an efficiently extensible collection (list) type, [System.Collections.Generic[T]]:
$array =
'testfile001_TR1',
'testfile001_TR2',
'testfile001_TR3',
'testfile002_TR1',
'testfile002_TR2',
'testfile002_TR3',
'testfile003_TR1',
'testfile003_TR2',
'testfile003_TR3'
$lists =
[System.Collections.Generic.List[string]]::new(),
[System.Collections.Generic.List[string]]::new(),
[System.Collections.Generic.List[string]]::new()
switch -Wildcard ($array) {
'testfile001*' { $lists[0].Add($_) }
'testfile002*' { $lists[1].Add($_) }
default { $lists[2].Add($_) }
}
If I got it right something like this should work actually.
First you get all desired files from the directory you specify sorted by their file names:
$FileList =
Get-ChildItem -Path 'D:\sample' -Filter 'testfile*.mp3' |
Sort-Object -Property BaseName
The result would be something similar to this:
$FileList =
'testfile001_TR1',
'testfile001_TR2',
'testfile001_TR3',
'testfile002_TR1',
'testfile002_TR2',
'testfile002_TR3',
'testfile256_TR1',
'testfile256_TR2',
'testfile256_TR3'
Now you can use a for loop to process the files in chunks of 3 as you like:
for ($i = 0; $i -lt $FileList.Count; $i += 3) {
"Chunk Number '$(($i/3) + 1 )'"
"Do something meaningful with the file #1 '$($FileList[$i])'"
"Do something meaningful with the file #2 '$($FileList[$i + 1])'"
"Do something meaningful with the file #3 '$($FileList[$i + 2])'"
}
The sample output would look like this:
Chunk Number '1'
Do something meaningful with the file #1 'testfile001_TR1'
Do something meaningful with the file #2 'testfile001_TR2'
Do something meaningful with the file #3 'testfile001_TR3'
Chunk Number '2'
Do something meaningful with the file #1 'testfile002_TR1'
Do something meaningful with the file #2 'testfile002_TR2'
Do something meaningful with the file #3 'testfile002_TR3'
Chunk Number '3'
Do something meaningful with the file #1 'testfile256_TR1'
Do something meaningful with the file #2 'testfile256_TR2'
Do something meaningful with the file #3 'testfile256_TR3'