F#:编写一个将任何类型的数组作为输入的函数
F#: Writing a function that takes any kind of array as input
我是编程新手,F# 是我的第一语言。
这是我的部分代码:
let splitArrayIntoGroups (inputArray: string[]) (groupSize: int) =
let groups = new LinkedList<string[]>()
let rec splitRecursively currentStartIndex currentEndIndex =
groups.AddLast(inputArray.[currentStartIndex..currentEndIndex]) |> ignore
let newEndIndex = Math.Min((inputArray.Length - 1), (currentEndIndex + groupSize))
if newEndIndex <> currentEndIndex then
splitRecursively (currentStartIndex + groupSize) newEndIndex
splitRecursively 0 (groupSize - 1)
groups
我希望这个函数能够接受任何类型的数组(包括我自己定义的类型)作为输入。我应该做哪些改变?
将函数签名中的 string[]
替换为 _[]
。
这已经得到回答,但这里你有一个不使用链表而只是列表数组的实现
let rec split<'T> (input: 'T array) size =
let rec loopOn (tail : 'T array) grouped =
let lastIndex = Array.length tail - 1
let endindx = min (size - 1) lastIndex
let arrWrapper = (fun e -> [|e|])
let newGroup = tail.[0..endindx]
|> List.ofArray
|> arrWrapper
|> Array.append grouped
match tail with
| [||] -> newGroup
|> Array.filter (fun e -> List.length e > 0)
| _ -> loopOn tail.[endindx + 1..] newGroup
let initialState = [|List.empty<'T>|]
loopOn input initialState
因为这是通用实现,所以您可以用不同的类型调用它
type Custom = {Value : int}
let r = split<int> [|1..1000|] 10
let r2 = split<float> [|1.0..1000.0|] 10
let r3 = split<Custom> [|for i in 1..1000 ->
{Value = i}|] 10
我是编程新手,F# 是我的第一语言。
这是我的部分代码:
let splitArrayIntoGroups (inputArray: string[]) (groupSize: int) =
let groups = new LinkedList<string[]>()
let rec splitRecursively currentStartIndex currentEndIndex =
groups.AddLast(inputArray.[currentStartIndex..currentEndIndex]) |> ignore
let newEndIndex = Math.Min((inputArray.Length - 1), (currentEndIndex + groupSize))
if newEndIndex <> currentEndIndex then
splitRecursively (currentStartIndex + groupSize) newEndIndex
splitRecursively 0 (groupSize - 1)
groups
我希望这个函数能够接受任何类型的数组(包括我自己定义的类型)作为输入。我应该做哪些改变?
将函数签名中的 string[]
替换为 _[]
。
这已经得到回答,但这里你有一个不使用链表而只是列表数组的实现
let rec split<'T> (input: 'T array) size =
let rec loopOn (tail : 'T array) grouped =
let lastIndex = Array.length tail - 1
let endindx = min (size - 1) lastIndex
let arrWrapper = (fun e -> [|e|])
let newGroup = tail.[0..endindx]
|> List.ofArray
|> arrWrapper
|> Array.append grouped
match tail with
| [||] -> newGroup
|> Array.filter (fun e -> List.length e > 0)
| _ -> loopOn tail.[endindx + 1..] newGroup
let initialState = [|List.empty<'T>|]
loopOn input initialState
因为这是通用实现,所以您可以用不同的类型调用它
type Custom = {Value : int}
let r = split<int> [|1..1000|] 10
let r2 = split<float> [|1.0..1000.0|] 10
let r3 = split<Custom> [|for i in 1..1000 ->
{Value = i}|] 10