Not real sure if this is a mnemoic, but a rule of thumb that I find useful when explaining the behaviour of chained maps and other list functions is
Maps make more sense when read right to left.
OT:I remember learning the color codes for resistors in electronics class in high school. The teacher gave us a contrived mnemoic which frankly I could never keep in my head. I was saved however by an electronics book from years before which had the rather saucy menomic
Bad Boys Raped Our Young Girls But Violette Gave Willingly
Which I have never managed to forget. :-)
Yves / DeMerphq
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