Comment Feed for Channel 9 - An Introduction to Microsoft F#

Re: An Introduction to Microsoft F#

stevo_ — Mon, 03 Nov 2008 14:41:11 GMT

This is really really cool, exactly what I've wanted to see in regards to F#.. I've seen so many little examples that really didn't help me envisage using this every day..

let the |> fun commence

(hurr!)

posted by stevo_

Re: An Introduction to Microsoft F#

CbrAInK — Tue, 04 Nov 2008 20:50:56 GMT

Wow - this the best show I've seen here so far - it even outperforms "don't fear the monads"
Hope to see more of this stuff around.

Thanks for the fun !

posted by CbrAInK

Re: An Introduction to Microsoft F#

Art Scott — Wed, 05 Nov 2008 17:13:32 GMT

Appaluse!

Encore.

posted by Art Scott

Re: An Introduction to Microsoft F#

SneakerXZ — Fri, 07 Nov 2008 19:40:41 GMT

Yea, I really enjoyed this presentation . One of best. It gives nice tasting of F#. I recommend this.

posted by SneakerXZ

Re: An Introduction to Microsoft F#

birbilis — Tue, 11 Nov 2008 16:09:27 GMT

regarding the pipeline (|>) operator example: couldn't one just write Seq.sum(Seq.map(nums,sqr) and get done with it?

posted by birbilis

Re: An Introduction to Microsoft F#

ysw — Wed, 12 Nov 2008 22:21:58 GMT

|> is like . (dot) in C# - especially when talking about extension methods.

posted by ysw

Re: An Introduction to Microsoft F#

gustavo — Wed, 19 Nov 2008 04:04:14 GMT

Thank you so much. So much F# in so little time. I've already had some fun with this language, and your presentation helps me to understand how to solve some practical business problems (like I do with C# and VB.NET, presently).

Kudos!

posted by gustavo

Re: An Introduction to Microsoft F#

mspan — Mon, 01 Dec 2008 21:38:04 GMT

Great Presentation!
I am watchin git for the second time and coding along through the demo. However, I am getting an error in the StockAnalyzer type...

type StockAnalyzer (lprices, days) =

let prices =
        lprices
        |> Seq.map snd
        |> Seq.take days
static member GetAnalyzers (tickers,days) =
    tickers
    |> Seq.map loadPrices
    |> Seq.map (fun prices -> new StockAnalyzer (prices, days))
member s.Return =
    let lastPrice = prices |> Seq.nth 0
    let startPrice = prices |> Seq.nth (days - 1)
    lastPrice / startPrice -1.

... the last line is not working ... getting "This value is not a function and cannot be applied" error when mouseover startPrice variable. Any advice for f# newbie? I am running the 1.9.6.2 version of f# with VS integrated shell.
Thanks!
mspan
www.fsharpener.blogspot.com

posted by mspan

Re: An Introduction to Microsoft F#

elvistcb3577 — Thu, 04 Dec 2008 03:33:06 GMT

Isn't something like this more succinct but just as expressive without losing the declarative nature?

exm.

let sumOfSquares nums = sum (each nums sqr)

sumOfSquares [0,2,5,8]

posted by elvistcb3577

Re: An Introduction to Microsoft F#

hossein.haeri — Tue, 30 Dec 2008 17:05:18 GMT

Very great presentation. Thanks Luca.

The async stuff didn't work for me. In fact, neither AsyncGetResponse nor AsyncReadToEnd exist in my version (.Net 3.5 under MSVS2008). The Plot function of Graphics is also not available. Seems to me like a special library is needed...

posted by hossein.haeri

Re: An Introduction to Microsoft F#

krusaint — Thu, 15 Jan 2009 06:31:27 GMT

Really good presentation. Looking forward for more of F#.

posted by krusaint

Re: An Introduction to Microsoft F#

seiichirou — Sun, 15 Feb 2009 14:50:43 GMT

elvistcb: yes there is:
(define (sum-of-squares nums) (fold-left + (map sqr nums)))
(sum-of-squares '(0 2 5 8))

posted by seiichirou

Re: An Introduction to Microsoft F#

Xylon — Mon, 02 Mar 2009 22:44:45 GMT

This is the best presentation I've ever seen come out of MSFT! Congrats. As a fresh CS grad, I've heard academic whispering about functional programming but have never had the opportunity nor took the initiative to dig any deeper and learn it for myself. I'm excited that a pragmatic, .NET interoperable, first-class functional language is on the way from Microsoft. Great work guys! After 20-odd years following the computer industry I've never been happier with Microsoft. F# (and Oslo) show that Microsoft is not being complacent. And after Apple's all-style-no-substance "I'm a Mac; I'm a PC" campaign I even find myself rooting for MSFT. But I'm rambling in short great work on F# and a great introductory presentation with a sprinkling of humour .

posted by Xylon

Re: An Introduction to Microsoft F#

Joiseystud — Thu, 14 May 2009 03:33:36 GMT

Awesome video.

posted by Joiseystud

Re: An Introduction to Microsoft F#

RAJENDER P. REDDY — Tue, 23 Jun 2009 20:45:56 GMT

Good Presentation!

After the presentation, I had some fun with this F#.

It's an interessting language like C#.

Thanks.

-Raja

+1 404 424 4674

posted by RAJENDER P. REDDY

Re: An Introduction to Microsoft F#

indulge — Tue, 08 Dec 2009 00:20:14 GMT

In regard to the examples, can you share the C# utilities and .dll files?

Thanks,

posted by indulge

Re: An Introduction to Microsoft F#

indulge — Tue, 08 Dec 2009 00:34:45 GMT

Can you post the code files used in the demo/talk?

Thanks

posted by indulge

Re: An Introduction to Microsoft F#

sean r — Thu, 25 Feb 2010 23:57:35 GMT

Superb presentation, thanks.

posted by sean r

Re: An Introduction to Microsoft F#

StockTrader — Thu, 15 Apr 2010 10:54:44 GMT

Hello Luca,

this video is fantastic!! Very intetresting. This F# remembers me the time when I was studing ML.

Seems very very promising.

Saluti da Reading - UK

Marcco -- StockTrader

posted by StockTrader

Re: An Introduction to Microsoft F#

koistya — Mon, 23 Aug 2010 20:17:13 GMT

This is one of the greatest presentations. Thanks Luca, you're damn good)

posted by koistya

Re: An Introduction to Microsoft F#

Zibri — Tue, 16 Nov 2010 14:31:43 GMT

Non capisco una cosa: lavori in Microsoft e mi sembri una persona in gamba, perche' non fai un bel corso di pronuncia inglese? Neanche nei film gli italiani parlano inglese in quel modo! :)
-----
I don't understand one thing: you are a Microsoft employee and yet you don't know how to pronounce english? Not even in movies italians pronounce english that way! :D

posted by Zibri

Re: An Introduction to Microsoft F#

JimLewis — Tue, 23 Nov 2010 02:07:50 GMT

Bravissimo!

posted by JimLewis

Re: An Introduction to Microsoft F#

Rustan — Thu, 25 Nov 2010 17:09:39 GMT

nice =)

posted by Rustan

Re: An Introduction to Microsoft F#

Krishna_Nadiminti — Fri, 26 Nov 2010 00:48:00 GMT

Excellent talk mate.

posted by Krishna_Nadiminti

Re: An Introduction to Microsoft F#

Fri, 03 Dec 2010 09:21:45 GMT

@birbilis: more compact yes, simpler to understand no

posted by g

Re: An Introduction to Microsoft F#

Anthony — Fri, 10 Dec 2010 17:31:11 GMT

Concise and entertaining one-hour intro to F#.
Excellent

posted by Anthony

Re: An Introduction to Microsoft F#

FD — Tue, 14 Dec 2010 15:16:51 GMT

@birbilis:
Pipelining functions with classical C-Syntax gets messy when you have many functions with many parameters.
Syntax itself changes the way you percieve programming -- it does indeed matter. If you use C# with and without LINQ, you notice how massive the difference between a functional approach and a sequential/imperative approach can be.
I'm a big fan of the new functional features emerging in .NET, and this takes it a step further.

posted by FD

Re: An Introduction to Microsoft F#

Peter — Fri, 25 Feb 2011 07:36:42 GMT

@Zibri:I am American and had no trouble understanding him. His English is excellent. Very nice video!

posted by Peter

Re: An Introduction to Microsoft F#

bewnet — Mon, 11 Apr 2011 02:31:59 GMT

What an amayzing presentation!
Teachs a lot! And the examples are practical application than to play with list of numbers and characters.
Cheeeeeeeeeeeeeeerrrrrrrsssss

posted by bewnet

Re: An Introduction to Microsoft F#

preets — Tue, 24 May 2011 19:29:22 GMT

Such a relaxed presentation ! Good one

posted by preets

Re: An Introduction to Microsoft F#

Alomgir A Miah — Mon, 25 Jul 2011 05:04:02 GMT

This is really an awesome presentation. Thanks

posted by Alomgir A Miah

Re: An Introduction to Microsoft F#

Sam — Mon, 22 Aug 2011 23:59:54 GMT

The best accent I've ever heard! :)

posted by Sam

Re: An Introduction to Microsoft F#

Sam — Tue, 23 Aug 2011 00:02:02 GMT

The best accent I've ever heard! :)

posted by Sam

Re: An Introduction to Microsoft F#

Sam — Tue, 23 Aug 2011 00:02:36 GMT

The best accent I've ever heard! :)

posted by Sam

Re: An Introduction to Microsoft F#

Jason — Sun, 18 Sep 2011 02:05:22 GMT

Excellent presentation!! Informative and comical at the same time

posted by Jason

Re: An Introduction to Microsoft F#

Victor — Mon, 19 Sep 2011 18:06:59 GMT

Hi!
I entered the same code as in 38:11 but when I type "grid prices;;", I get "C:\Users\Victor\AppData\Local\Temp\stdin (4,1): error FS0039: The value or constructor ' grid ' is not defined"
How can I solve the problem. Thanks for your reply!
Great video by the way!
/Victor

posted by Victor

Re: An Introduction to Microsoft F#

DonnaMalayeri — Fri, 14 Oct 2011 18:18:31 GMT

@Victor: thanks for your interest! The best place to ask these questions is over at the MSDN F# forum (http://social.msdn.microsoft.com/Forums/en-US/fsharpgeneral/threads). The short answer to your question is that Luca had already defined "grid" in his project. If you want to use these sorts of charting features in your F# programs, check out this blog post (http://blogs.msdn.com/b/fsharpteam/archive/2011/04/15/getting-started-with-fsharpchart.aspx).

posted by DonnaMalayeri

Re: An Introduction to Microsoft F#

murph — Fri, 21 Oct 2011 11:16:25 GMT

Great presentation. Shame it wasn't helped with some of the sad attempts at gotcha questions at the end. The biggest problem with this industry is the type who just want to demonstrate to them how 'smart' they are.

posted by murph

Re: An Introduction to Microsoft F#

sm0606 — Fri, 04 Nov 2011 03:43:59 GMT

The code for getting the prices in C# using LINQ. It's kind of the same and little shorter.

var prices = csv.Split('\n')
.Skip(1)
.Select(line => line.Split(','))
.Where(values => values.Length == 7)
.Select(values => new { Date = DateTime.Parse(values[0]), Price = values[6] });

posted by sm0606