3 people like it.

Hex string to byte array

Hex string to byte array via sequences

1: 
2: 
3: 
4: 
5: 
6: 
7: 
8: 
9: 
open System

let fromHex (s:string) = 
  s
  |> Seq.windowed 2
  |> Seq.mapi (fun i j -> (i,j))
  |> Seq.filter (fun (i,j) -> i % 2=0)
  |> Seq.map (fun (_,j) -> Byte.Parse(new System.String(j),System.Globalization.NumberStyles.AllowHexSpecifier))
  |> Array.ofSeq
namespace System
val fromHex : s:string -> byte []

Full name: Script.fromHex
val s : string
Multiple items
val string : value:'T -> string

Full name: Microsoft.FSharp.Core.Operators.string

--------------------
type string = String

Full name: Microsoft.FSharp.Core.string
module Seq

from Microsoft.FSharp.Collections
val windowed : windowSize:int -> source:seq<'T> -> seq<'T []>

Full name: Microsoft.FSharp.Collections.Seq.windowed
val mapi : mapping:(int -> 'T -> 'U) -> source:seq<'T> -> seq<'U>

Full name: Microsoft.FSharp.Collections.Seq.mapi
val i : int
val j : char []
val filter : predicate:('T -> bool) -> source:seq<'T> -> seq<'T>

Full name: Microsoft.FSharp.Collections.Seq.filter
val map : mapping:('T -> 'U) -> source:seq<'T> -> seq<'U>

Full name: Microsoft.FSharp.Collections.Seq.map
type Byte =
  struct
    member CompareTo : value:obj -> int + 1 overload
    member Equals : obj:obj -> bool + 1 overload
    member GetHashCode : unit -> int
    member GetTypeCode : unit -> TypeCode
    member ToString : unit -> string + 3 overloads
    static val MaxValue : byte
    static val MinValue : byte
    static member Parse : s:string -> byte + 3 overloads
    static member TryParse : s:string * result:byte -> bool + 1 overload
  end

Full name: System.Byte
Byte.Parse(s: string) : byte
Byte.Parse(s: string, provider: IFormatProvider) : byte
Byte.Parse(s: string, style: Globalization.NumberStyles) : byte
Byte.Parse(s: string, style: Globalization.NumberStyles, provider: IFormatProvider) : byte
Multiple items
type String =
  new : value:char -> string + 7 overloads
  member Chars : int -> char
  member Clone : unit -> obj
  member CompareTo : value:obj -> int + 1 overload
  member Contains : value:string -> bool
  member CopyTo : sourceIndex:int * destination:char[] * destinationIndex:int * count:int -> unit
  member EndsWith : value:string -> bool + 2 overloads
  member Equals : obj:obj -> bool + 2 overloads
  member GetEnumerator : unit -> CharEnumerator
  member GetHashCode : unit -> int
  ...

Full name: System.String

--------------------
String(value: nativeptr<char>) : unit
String(value: nativeptr<sbyte>) : unit
String(value: char []) : unit
String(c: char, count: int) : unit
String(value: nativeptr<char>, startIndex: int, length: int) : unit
String(value: nativeptr<sbyte>, startIndex: int, length: int) : unit
String(value: char [], startIndex: int, length: int) : unit
String(value: nativeptr<sbyte>, startIndex: int, length: int, enc: Text.Encoding) : unit
namespace System.Globalization
type NumberStyles =
  | None = 0
  | AllowLeadingWhite = 1
  | AllowTrailingWhite = 2
  | AllowLeadingSign = 4
  | AllowTrailingSign = 8
  | AllowParentheses = 16
  | AllowDecimalPoint = 32
  | AllowThousands = 64
  | AllowExponent = 128
  | AllowCurrencySymbol = 256
  ...

Full name: System.Globalization.NumberStyles
field Globalization.NumberStyles.AllowHexSpecifier = 512
type Array =
  member Clone : unit -> obj
  member CopyTo : array:Array * index:int -> unit + 1 overload
  member GetEnumerator : unit -> IEnumerator
  member GetLength : dimension:int -> int
  member GetLongLength : dimension:int -> int64
  member GetLowerBound : dimension:int -> int
  member GetUpperBound : dimension:int -> int
  member GetValue : [<ParamArray>] indices:int[] -> obj + 7 overloads
  member Initialize : unit -> unit
  member IsFixedSize : bool
  ...

Full name: System.Array
val ofSeq : source:seq<'T> -> 'T []

Full name: Microsoft.FSharp.Collections.Array.ofSeq
Raw view New version

More information

Link:http://fssnip.net/gf
Posted:6 years ago
Author:Gennady Loskutov
Tags: hex , conversion