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advent-of-code-2023/AdventOfCode2023.FSharp/AdventOfCode2023.FSharp.Lib/ResizeArray.fs
patrick bcd2bb6349
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Speed up day 7 a bit (#7)
I'm going mad, why am I doing this

Co-authored-by: Smaug123 <patrick+github@patrickstevens.co.uk>
Reviewed-on: #7
2023-12-07 23:52:34 +00:00

41 lines
1.0 KiB
Forth

namespace AdventOfCode2023.ResizeArray
open System
type ResizeArray<'T> =
private
{
mutable Array : 'T array
mutable Length : int
}
member this.Count = this.Length
member this.Clear () = this.Length <- 0
member this.Add (t : 'T) =
if this.Length < this.Array.Length then
this.Array.[this.Length] <- t
else
let newLength = this.Length * 2
let newArray = Array.zeroCreate<'T> newLength
Array.blit this.Array 0 newArray 0 this.Length
newArray.[this.Length] <- t
this.Array <- newArray
this.Length <- this.Length + 1
member this.Item
with get (i : int) = this.Array.[i]
and set (i : int) (t : 'T) = this.Array.[i] <- t
member this.Sort () =
Span(this.Array).Slice(0, this.Count).Sort ()
[<RequireQualifiedAccess>]
module ResizeArray =
let create<'T> (capacity : int) =
{
Array = Array.zeroCreate<'T> capacity
Length = 0
}