Weak Head Normal Form

Weak Head Normal Form - Normal form means, the expression will be fully evaluated. But then i read this wikipedia article where whnf is defined for the lambda calculus as follows: Now, i have following expression: Weak head normal form means, the expression will only evaluate as far as necessary to reach to a data constructor. Web i have question about weak head normal form and normal form. Web weak head normal form. An expression is in weak head normal form (whnf), if it is either: A term in weak head normal form is either a term in head normal form or a lambda abstraction. Web reduce terms to weak normal forms only. (f x) ] = false (2) whnf [ x y ] = whnf [ x ] (3) in all other cases whnf [x] = true (4)

Web i have question about weak head normal form and normal form. Normal form means, the expression will be fully evaluated. So, seq forced the list to be evaluated but not the components that make. Aside from a healthy mental workout, we find lambda calculus is sometimes superior: An expression in weak head normal form has been evaluated to the outermost data constructor or lambda abstraction (the head). And once i read through them i thought i got it. Section 6 de ne these normal forms. Now, i have following expression: Web weak head normal form. Web evaluates its first argument to head normal form, and then returns its second argument as the result.

An expression is in weak head normal form (whnf), if it is either: Now, i have following expression: An expression in weak head normal form has been evaluated to the outermost data constructor or lambda abstraction (the head). And once i read through them i thought i got it. A constructor (eventually applied to arguments) like true, just (square 42) or (:) 1. A term in weak head normal form is either a term in head normal form or a lambda abstraction. Aside from a healthy mental workout, we find lambda calculus is sometimes superior: Alonzo church was alan turing’s doctoral advisor, and his lambda calculus predates turing machines. Reduction strategies [ edit ] Normal form means, the expression will be fully evaluated.

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But Then I Read This Wikipedia Article Where Whnf Is Defined For The Lambda Calculus As Follows:

Web evaluates its first argument to head normal form, and then returns its second argument as the result. Web weak head normal form. But more importantly, working through the theory from its original viewpoint exposes us to different ways of thinking. An expression is in weak head normal form (whnf), if it is either:

Web There Is Also The Notion Of Weak Head Normal Form:

So, seq forced the list to be evaluated but not the components that make. And once i read through them i thought i got it. Seq is defined as follows. Web the first argument of seq is not guaranteed to be evaluated before the second argument.

Reduction Strategies [ Edit ]

A constructor (eventually applied to arguments) like true, just (square 42) or (:) 1. (f x) ] = false (2) whnf [ x y ] = whnf [ x ] (3) in all other cases whnf [x] = true (4) The evaluation of the first argument of seq will only happen when the. Whnf [ (\x.y) z ] = false (1) whnf [ \x.

Aside From A Healthy Mental Workout, We Find Lambda Calculus Is Sometimes Superior:

Web reduce terms to weak normal forms only. An expression in weak head normal form has been evaluated to the outermost data constructor or lambda abstraction (the head). Section 6 de ne these normal forms. Weak head normal form means, the expression will only evaluate as far as necessary to reach to a data constructor.

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