application/octet-stream
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1.15 KB
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41 lines
; Nujel - Copyright (C) 2020-2021 - Benjamin Vincent Schulenburg
; This project uses the MIT license, a copy should be included under /LICENSE
;; Some functions dealing with arrays
[defun array/+= [a i v]
"Add V to the value in A at position I and store the result in A returning A"
[array/set! a i [+ v [array/ref a i]]]]
[defun array/++ [a i]
"Increment position I in A and return A"
[array/+= a i 1]]
[defun array/fill! [a v i]
"Fills array a with value v"
[def len [array/length a]]
[for [i 0 len]
[array/set! a i v]]
a]
[defun array/reduce [fun arr α]
[def len [array/length arr]]
[for [i 0 len]
[set! α [fun α [arr i]]]]
α]
[defun array/map [fun arr]
[def len [array/length arr]]
[for [i 0 len]
[array/set! arr i [fun [arr i]]]]
arr]
[defun array/filter [pred arr]
[def ri 0]
[def len [array/length arr]]
[def ret [array/allocate len]]
[for [ai 0 len]
[when [pred [arr ai]]
[array/set! ret ri [arr ai]]
[++ ri]]]
[array/length! ret ri]]
