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Expert F# Sample Code Problems
f#book

The first code example in _Expert F#_ is:

let wordCount text =
let words = String.split [' '] text
let wordSet = Set.of_list words
let nWords = words.Length
let nDups = words.Length - wordSet.Count
(nWords,nDups)

However, I get the error:
error FS0039: The value, constructor, namespace or type 'split' is not defined

And yes, after an hour or so of research, I discovered there is something called the Power Pack I need to reference, and I am doing that. Still, there doesn't seem to be a split method for String. Also, it looks like Set.of_list is now Set.ofList, but the latest code on www.expert-fsharp.com appears out of date.

Any help would be appreciated as I would like to try the samples in the book out.

I'm using:
Visual Studio 2010 Shell
F# 2.0 November 2010 MSI

.

I got this to work just by adding in the splitAtSpaces function and changing of_List to ofList:

let splitAtSpaces (text : string) =

text.Split ' '

|> Array.toList

let wordCount text =

let words = splitAtSpaces text

let wordSet = Set.ofList words

let nWords = words.Length

let nDups = words.Length - wordSet.Count

(nWords,nDups)

By on 12/16/2010 8:57 AM ()

I'm having better luck referencing FSharp.PowerPack.Compatibility.dll. The following works:

#r "FSharp.PowerPack.Compatibility.dll"

let wordCount text =
let words = String.split [' '] text
let wordSet = Set.ofList words
let nWords = words.Length
let nDups = words.Length - wordSet.Count
(nWords,nDups)

Still, some things seem to have changed, like Set.of_list.

--Chris

By on 12/16/2010 8:50 AM ()

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