Difference in F# and Clojure when calling redefined functions
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by Michiel Borkent
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Published on 2010-04-03T08:09:34Z
Indexed on
2010/04/03
8:23 UTC
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In F#:
> let f x = x + 2;;
val f : int -> int
> let g x = f x;;
val g : int -> int
> g 10;;
val it : int = 12
> let f x = x + 3;;
val f : int -> int
> g 10;;
val it : int = 12
In Clojure:
1:1 user=> (defn f [x] (+ x 2))
#'user/f
1:2 user=> (defn g [x] (f x))
#'user/g
1:3 user=> (g 10)
12
1:4 user=> (defn f [x] (+ x 3))
#'user/f
1:5 user=> (g 10)
13
Note that in Clojure the most recent version of f gets called in the last line. In F# however still the old version of f is called. Why is this and how does this work?
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