Tableau create unique max date - tableau-api

Question

I Need to get the Unique value of Max([Date]).
I have this calculation for max date:
{ FIXED [City] : Max([Date]) }
Count :
IF[Max Date (Last Street)]= [Date]
THEN [Count Record]
Else 0
END
For Example:
City Date Street I get (Count) I Want (Count)
Miami 01/01/2019 1st 0 0
Miami 01/02/2019 2nd 0 0
Miami 01/03/2019 3rd 1 0
Miami 01/03/2019 4th 1 1

Answer 1

This would be a good situation to mix LOD calculations and Table Calculations. Your initial LOD function looks good, as it will find the complete max date per each city. From there, you can apply the concept of the calculated field you already have started and add a Table Calculation (Last()):
IF ATTR([Max Date (Last Street)]) = ATTR([Date])
AND LAST() == 0
THEN [Count Record]
Else 0
END
Note that the other portions of the calculated field are wrapped in ATTR() to make them into aggregations.
Once you add additional cities back into the data, you'll have to edit the table calculation by Right clicking on table calculation on view > Edit Table Calculation...
Take note of the fact that Specific Dimensions is selected and Restarting Every is changed to "City"
Final product should look like this:
Alternative Method:
If you'd like to purely use LODs and your street names always contain unique ascending numbers:
If Date = {Fixed [City]: MAX(Date)}
AND REGEXP_EXTRACT([Street],'(\d+)') = {FIXED [City], [Date]:
MAX(REGEXP_EXTRACT([Street],'(\d+)'))}
Then 1
Else 0
END
The above will essentially extract the number from the street then add it as a condition in addition to the MAX(Date) which already exists. Then the you will only get a 1 when both conditions have been met.
The end result will be the same as above.