Hello, guys.
Help me please. I have a table with emails repetitions. I need to filter it to get only unique ones. I use .unique() in filter formula but it doesn`t work. What am I doing wrong?
Here is the screenshot
Here`s the link to the doc
Hi there @Alexey_Demin 
!
I think I would simply use an interactive filter instead of a formula to filter your table by the test email adresses .
Thanks for your reply @Pch . But this solution bring me to the opposite result I`m looking for. Interactive filter in your example shows the emails that repeat itself. I need the table with unique emails only without any repetitions.
Sorry @Alexey_Demin , I misunderstood your problem .
If I understand correctly this time, you want to filter your table table by emails which are not duplicates.
This is not done as easily as using a formula but it can be done 
You first need to indicate clearly, in your table, which emails are duplicates from the others and once youâve determined that, then you can filter your table by using a formula (or still an interactive filter)
In my sample, in the Example 1, Iâve added a Row ID field (which is a Property type of field) and a field Count().
The field Count() counts cumulatively how many times Email Test X appears in the table.
So to get to your desired result, after that, you just need to filter your table using the Count() field instead of the emails with Count() = 1
The Example 2 works following the same principle but with a Checkbox field, which you can also use to filter your table .
There might be other ways to do that too
I hope this helps
1 Like
Yep. But seems like this will sort out from the table all emails that are mentioned more then once. I need unique emails only in the table.
If I get you right, you want to display the same table but filter out the rows where the same email has appeared before?
Then the task is split into two steps:
- Figure out if this email appeared before
- Filter out those rows
To figure out if this email appeared before, you first need to let Coda know whatâs âbeforeâ. You can do that by e.g. indexing your rows using
thisTable.Find(thisRow)
or any other way to give them some order (e.g. by simply calculating thisRow.RowId())
Then to see if an email appeared in any of the previous rows, youâll add a formula:
thisTable.Filter(
Index < thisRow.Index
AND email = thisRow.email
).IsNotBlank()
(or .IsBlank() to get true for rows where the email appears for the first time but not the subsequent ones)
All thatâs left is to add a filter to only show rows where this checkbox is not set (i.e. no prior row with the same email found).
Implemented in the original doc that you shared:
As for the Unique() function â thatâs a function that takes in a list of values and reduces it down to only unique values. Thatâs when you want to use that value in a formula. Itâs useless in a filter like the one you needed here.
4 Likes
@Paul_Danyliuk, I am impressed by the beauty of this concise formula , it is so elegant.
I tried to make it work via a button with a FormulaMap but could not differentiate between the complete column and the âThisRow variationâ. Is there a way to do so or does this only work inside a table?
thisTable.Filter(
Index < ThisRow.Index
AND email = ThisRow.email
).IsNotBlank()
Thanks!
Hey guys,
Newbie here. Dealing with a somewhat similar situation as in this scenario here, but with the added factor of a date. What I want is to keep only the unique rows by filtering out the duplicates on a specific column but keep the freshest ones based on a date in another column. I added the RowId column but for some reason I am mising the numbering is funky and doesn"t make much sense. Any ideas?
Hello @Thanasis_Sarakis ,
I canât say I am really happy with my solution for this, but it works and sometimes thatâs all that matters. You can checkout my sample document.