Cum scriem "declaratii locale" in interiorul unor functii ?
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Se poate folosi o expresie cu let, desi nu e singura solutie:
Exemplul 1: let f = (\x -> x +1) in f 2
Entitatile declarate local si folosite in expresie pot fi obtinute si in urma unei potriviri de sabloane ("pattern matching"):
Exemplul 2: let (a,b) = ( [1,2] , [3] ) in a ++ b