s2k

s2k

Author of Fast Feedback Using Ruby

Seven Obscure Languages in Seven Weeks: 'Writing Comments & "Hello World!" p. 3 & 4 (in PDF)

The book shows an interactive session like this:

1↩ ok 1
2↩ ok 2
"Hello"↩ ok 4
'W'↩ ok 5
BYE↩

However, when I try this (on both macOS & Linux (Mint), I get the following:

~$ gforth
Gforth 0.7.3, Copyright (C) 1995-2008 Free Software Foundation, Inc.
Gforth comes with ABSOLUTELY NO WARRANTY; for details type `license'
Type `bye' to exit
1  ok
2  ok
"Hello" 
:3: Undefined word
>>>"Hello"<<<
Backtrace:
$7FE7BE18FA68 throw 
$7FE7BE1A5DF0 no.extensions 
$7FE7BE18FD28 interpreter-notfound1 
'W'  ok
bye 
~$ gforth -v
gforth 0.7.3

The stack depth isn’t displayed anymore, and entering a String (with more than one character) causes an error and a stack trace.

Is this a mistake in the book? A bug in the Forth implementation? A misunderstanding on my side?

First Post!

aqsaqal

aqsaqal

Author of Pythonic Programming (+ 3 other titles)

There are several current gforth implementations. The most recent one, 0.7.9 used in the book, allows string literals in quotation marks. The more “classical” one, 0.7.3, the one that you use, defines strings with a Forth word s": s" Hello". I am sorry about this confusion. I will add a note to the next edition.

Where Next?

Popular Pragmatic Bookshelf topics Top

jamis
The following is cross-posted from the original Ray Tracer Challenge forum, from a post by garfieldnate. I’m cross-posting it so that the...
New
rmurray10127
Title: Intuitive Python: docker run… denied error (page 2) Attempted to run the docker command in both CLI and Powershell PS C:\Users\r...
New
jskubick
I think I might have found a problem involving SwitchCompat, thumbTint, and trackTint. As entered, the SwitchCompat changes color to hol...
New
Charles
In general, the book isn’t yet updated for Phoenix version 1.6. On page 18 of the book, the authors indicate that an auto generated of ro...
New
adamwoolhether
Is there any place where we can discuss the solutions to some of the exercises? I can figure most of them out, but am having trouble with...
New
akraut
The markup used to display the uploaded image results in a Phoenix.LiveView.HTMLTokenizer.ParseError error. lib/pento_web/live/product_l...
New
mert
AWDWR 7, page 152, page 153: Hello everyone, I’m a little bit lost on the hotwire part. I didn’t fully understand it. On page 152 @rub...
New
gorkaio
root_layout: {PentoWeb.LayoutView, :root}, This results in the following following error: no “root” html template defined for PentoWeb...
New
New
davetron5000
Hello faithful readers! If you have tried to follow along in the book, you are asked to start up the dev environment via dx/build and ar...
New

Other popular topics Top

AstonJ
If it’s a mechanical keyboard, which switches do you have? Would you recommend it? Why? What will your next keyboard be? Pics always w...
New
Exadra37
Please tell us what is your preferred monitor setup for programming(not gaming) and why you have chosen it. Does your monitor have eye p...
New
PragmaticBookshelf
From finance to artificial intelligence, genetic algorithms are a powerful tool with a wide array of applications. But you don't need an ...
New
New
AstonJ
Just done a fresh install of macOS Big Sur and on installing Erlang I am getting: asdf install erlang 23.1.2 Configure failed. checking ...
New
AstonJ
Continuing the discussion from Thinking about learning Crystal, let’s discuss - I was wondering which languages don’t GC - maybe we can c...
New
Maartz
Hi folks, I don’t know if I saw this here but, here’s a new programming language, called Roc Reminds me a bit of Elm and thus Haskell. ...
New
sir.laksmana_wenk
I’m able to do the “artistic” part of game-development; character designing/modeling, music, environment modeling, etc. However, I don’t...
New
mindriot
Ok, well here are some thoughts and opinions on some of the ergonomic keyboards I have, I guess like mini review of each that I use enoug...
New
PragmaticBookshelf
Quickly turn complex problems into simple, working solutions using functional programming, safe concurrency, and the expressive tools of ...
New

Sub Categories: