delete a CSV rows based on column value in Powershell

Question

I receive a CSV File everyday that has information I need, but i have to filter rows base on a different criteria for each row.

eg csv.

Name,Age,Date,Code
John,22,12/12/2020,5
Smith,16,12/01/2021,2
Jake,27,1/01/2020,1
Alice,18,2/02/2019,4
Fort,27,2/09/2021,2
Kevin,26,22/09/2019,5

I would like:

1. Remove all ages 18 and below in column 2
2. remove any dates past 2020 in column 3
3. Remove any codes that are 5 in column 5

My Result should be

Name,Age,Date,Code
Jake,27,1/01/2020,1
Fort,27,2/09/2021,2

Answer 1

$csv = @"
Name,Age,Date,Code
John,22,12/12/2020,5
Smith,16,12/01/2021,2
Jake,27,1/01/2020,1
Alice,18,2/02/2019,4
Fort,27,2/09/2021,2
Kevin,26,22/09/2019,5
"@ | ConvertFrom-Csv

$csv.where{
    ($_.Age -le 18,
    [datetime]::ParseExact($_.Date, 'd/MM/yyyy', $null) -ge [datetime]::ParseExact('01/01/2020', 'dd/MM/yyyy', $null),
    $_.Code -eq 5)
}

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