Recently I came across a Power Apps solution that needed to sort a collection by a date column. In this post the pains of sorting by date fields and how to work around them. Now there are a few ...
SharePains by Pieter Veenstra on MSN

CountRows, CountIf, CountA and Count in Power Apps

How often would you like to count the number of records without really wanting to load all the records that exist in a list ...