4 people like it.

String palindrome (short)

Dear #fssnip newbies, please do not write F# code as if you are still in C#. Direct ports are meaningless. Among other things, please learn what structural equality is.

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open System

let isPal str = 
    let str = str |> Seq.filter ((<>) ' ') |> Seq.toList
    str = (str |> List.rev)

["abc ba"; "abcba"; "a"; "aaba"; ""] 
|> List.map (fun x -> x, isPal x)
namespace System
val isPal : str:seq<char> -> bool

Full name: Script.isPal
val str : seq<char>
val str : char list
module Seq

from Microsoft.FSharp.Collections
val filter : predicate:('T -> bool) -> source:seq<'T> -> seq<'T>

Full name: Microsoft.FSharp.Collections.Seq.filter
val toList : source:seq<'T> -> 'T list

Full name: Microsoft.FSharp.Collections.Seq.toList
Multiple items
module List

from Microsoft.FSharp.Collections

--------------------
type List<'T> =
  | ( [] )
  | ( :: ) of Head: 'T * Tail: 'T list
  interface IEnumerable
  interface IEnumerable<'T>
  member Head : 'T
  member IsEmpty : bool
  member Item : index:int -> 'T with get
  member Length : int
  member Tail : 'T list
  static member Cons : head:'T * tail:'T list -> 'T list
  static member Empty : 'T list

Full name: Microsoft.FSharp.Collections.List<_>
val rev : list:'T list -> 'T list

Full name: Microsoft.FSharp.Collections.List.rev
val map : mapping:('T -> 'U) -> list:'T list -> 'U list

Full name: Microsoft.FSharp.Collections.List.map
val x : string
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Link:http://fssnip.net/im
Posted:6 years ago
Author:@kot_2010
Tags: strings