21 líneas
1.0 KiB
TeX
21 líneas
1.0 KiB
TeX
\ifger{Wieso haben wir uns so lange mit Currying aufgehalten? Nun, es ist wie gesagt sehr wichtig für \emph{Funktionskomposition}. Sie zählt ebenfalls zu den fundamentalen Basiskonzepten der funktionalen Programmierung.}{So why did we just bother so long with explaining currying? It's because it's very important for \emph{function composition}. Which again is also one of the fundamental concepts of functional programming.}
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\vspace{\baselineskip}
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\\
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\ifger{Aus der Mathematik wissen wir bereits, dass:}{From maths we already know that:}\\
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$(f \circ g)(x) = f(g(x))$
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\vspace{\baselineskip}
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\\
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\pause
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\ifger{Und das ist praktisch schon alles. Wir machen dasselbe in Haskell:}{And that's basically it. We do the same in haskell, it looks like this:}
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\begin{haskellcode}
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composedFunction x = (f . g) x
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-- same as above... everything on the right side of $
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-- is evaluated first
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composedFunction x = f . g $ x
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-- and same again, remember that 'g x ='
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-- is just syntax sugar
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-- omitting the x here is also called eta reduction
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composedFunction = f . g
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\end{haskellcode} |