Functional programming

Functional programming constructs in popular languages

	Haskell	Java	Scala	Groovy	Clojure	Python	R
map	<$>	map	map	collect	map
flatMap	>>=1	flatMap	flatMap		mapcat
filter	filter	filter	filter	findAll	filter
reduce	fold	reduce	foldLeft / reduceLeft	inject	reduce
zip	zip		zip	transpose	*		transpose
unzip	unzip		unzip

¹ pronounced 'bind'. Found in Haskell logo.