I document doing so here: http://mybizmo.blogspot.com/2017/05/coffee-shop-networking.html (see link to Wikipedia https://en.wikipedia.org/wiki/Partial_application#Implementations ) At what grade level should we introduce this fragment of lambda calc I wonder? http://mathforum.org/kb/thread.jspa?threadID=2858446 8th grade? The int( ) example in the documentation combines with with developing number sense. Kirby For further viewing: https://youtu.be/eTDH7m4vEiM (re lambda vs delta calc tracks, in Silicon Forest context)