Powershell replace operator is bringing across array artifacts - powershell

Question

I need to get a date from a cell in a CSV file, then remove the '20' from the year.
I have the below code:
$rateID="C:\Folder\Path\RateIDTable.csv"
$date = Import-CSV $rateid | select -first 1 -Property date
$date = $date -replace '[20]',''
write-output $date
Output looks like this though:
What I need is '17/01/18' but it adds the whole variable and removes the zero that I need.
Any tips on this one?
Thanks!

Answer 1

Either you convert the "string date" to a datetime object and format it accordingly or you change the regex pattern you use in your -replace operator like this
$date = $date -replace '/20','/'
The square brackets in regex define a charachter class. So with '[20]' the regex matches ALL two's and ALL zero's in the string.

Answer 2

OK, figured it out. bit of a messy way to do it, but here is my code:
$rateID="C:\Folder\Path\RateIDTable.csv"
$datestr="C:\folder\path\fdate.txt"
$date = Import-CSV $rateid | select -first 1 -Property date
$fdate = $date | foreach-object {$_.date} | set-content $datestr
$fdate = (get-content $datestr) -replace ('20','')
write-output $fdate
And my output is this:
17/01/18
Thanks to all those who helped!

Answer 3

Once you have your $date object, format it as such:
$date = $date.ToString("dd/MM/yy")
Adding more clarification since my answer did not seem to work for you. I assumed a few things, that I can see did not work for you.
$date1 = [datetime]::Now
$date2 = [datetime]::Parse("01/18/2018")
$mydate = "01/19/2018"
$date3 = [datetime]::Parse($mydate)
$date1.ToString("dd/MM/yy")
$date2.ToString("dd/MM/yy")
$date3.ToString("dd/MM/yy")
Your $date was a string, not a Date, so yes, to use ToString, it would need to be a DateTime object which you can see a few ways to create above. Hope this helps you in future efforts.
Note, you may need to change the strings depending on your locale so they parse correctly, but hopefully the above makes sense...