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F#class
f#

I wrote a class named Parser

type Parser(fileName:string)

let name=fileName.OpenText(name)

let reader=File.OpenText(name)

let command=null

member this.advance()=

let enfOfFile=reader.EndOfStream

if(endOfFile<>true) then

let commandLine=rader.ReadLine()

let split=(' ')

command= commandLine.Split(split,StringSplitOption.RemoveEmpryentries)

it's make me error with the last line : this expression has type bool is here used with type unit

I don't understand why..should I initialize command with something else?

split is a function that return char[] (all the substring)

.

It sounds like perhaps you want

let mutable command = null

and then

command <- commandLine.Split(...)

Note that "=" is a boolean equality test operator, whereas "<-" is a destructive assignment operator for mutables.

By on 11/1/2009 1:29 PM ()

when should I exactly use with " <- " ?

after I did it I have an error:

no overloads much to method split..

what I should do? the first argument need to be - char[]

and I sent to Split the variable -split

which defined :

let split=(' ')

...

By on 11/2/2009 8:12 AM ()

"char[]" means array of characters.

Array literals in F# use these brackets: [| |]

So you want to pass

[| ' ' |]

as the argument.

By on 11/2/2009 10:10 AM ()

thank you very much....it was very help full

By on 11/4/2009 4:57 AM ()

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