The lambda calculus and closures in Groovy

Alonzo Church (1903–1995)
Alonzo Church: Image via Wikipedia

No sooner had I written about the lambda calculus and Structure and Interpretation of Computer Programs than I sat in a lecture on closures in Groovy and was presented with a structure like this (which multiplies two numbers, in this case 3 and 4):

a simple closure in Groovy

Which immediately reminded me of one of Alonzo Church‘s formulations of lambdas – eg:

A lambda calculus representation of a formula

More to come…