This video tutorial explains how to remove the duplicated elements from an integer array, using the cpplinq library. This generic C++ library is being used as an Arduino library.
This operator is very simple but very useful, specially when used in more complex expression trees.
cpplinq: https://github.com/mrange/cpplinq
ESP32 FireBeetle board: https://www.dfrobot.com/product-1590....
Also tested on the ESP8266 FireBeetle board: https://www.dfrobot.com/product-1634....