Array to write into files by splits

hi,

have array contains around five-hundred-thousands values (sorted numbers). want value array , writing values splitting multiple files. conditions are: 

- want write 50000 array rows each file sequentially giving file numbers x_1, x_2 ... x_10 etc.
- 1 file can contain "multiple id" comes sequentially
- but, "multiple files" cannot contain "same id" (value)
- if going 50000th line in array see next-few-rows has same values 50000th line, include them writing same file, cannot take same id file
- so, write (50000 values) or (50000 values + continuation of same value) 1 file 

part of big process, able build until array, facing trouble write values splitting files following logic. can help?

sample array ($a):
9001
9001
9001
9001
9002
9002
9003
9003
9003
9003
9003
9004
9004
9004
9004
9004
9004
9004
9005
9006
9006
9006

so, assuming have following data structure:

$array[index] = psobject following properties: id, data, category, etc.

and want keep id's in same file - grouping id (value) , writing each group of same ids file? work this:

$grouping = $array | group-object id foreach($group in $grouping) {     $group.group | export-csv "group $($group.name).csv" }

if want more complex, it'd helpful see data structure , understand how trying use this. if goal have 50k-ish records in each file, might try this:

$grouping = $array | group-object id $tempfilearray = @() $fileid = 1 foreach($group in $grouping) {     $tempfilearray += $group.group     if ($tempfilearray.count -ge 50000)     {         $tempfilearray | export-csv "file $($fileid).csv"         $fileid++         $tempfilearray = @()     } }  # export remaining entries if ($tempfilearray.count -gt 0) {     $tempfilearray | export-csv "file $($fileid).csv" }

mike

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