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<span style="mso-spacerun:yes"></span>Dear All,
<br>
Imagine that you bought an iPhone 20 years ago. Over the
years, you have filled it with pictures, contacts, and other
personal data. You
now want to upgrade to iPhone SE and find that all your personal
data are lost
because there is no way to transfer your data. Very sad.<br>
<br>
The same has happened to me with Squeak. The Squeak programs
I have written over the past 20 years are effectively lost because I
can’t port
them to a current version of Squeak. Very sad.<br>
<br>
The essence of object orientation is that objects
collaborate to achieve a goal. I retired 20 years ago and made it my
task to
create DCI (Data-Context-Interaction), a programming paradigm that
merges the
concepts of class and collaboration. BabyIDE is a non-intrusive
Squeak program
that includes a model of DCI as well as tools for programming within
the
paradigm. BabyIDE is a kind of Dynabook, a personal computer for
experts in all
domains. Its target group could be department managers in business
and
industry; they are experts in running their department in
collaboration with
other managers. Another target group could be farmers; they are
experts in
taking care of their animals. A third target group could be
homeowners; they
build expertise in controlling their smart home.<br>
<br>
Squeak is more than a programming language; it is a live
universe of collaborating objects. The shared objects on the web is
also a
universe of collaborating objects that Kevin Kelly called a <i>single,
global
machine</i>. BabyIDE extends the Squeak image into this global
machine, making all the
combined objects available for personal programming as illustrated
below:<br>
<br>
<div align="center"><span style="mso-no-proof:yes"><img
src="cid:part1.B8569C86.7E4A26CB@ifi.uio.no" width="497"
height="284"></span><br>
</div>
<br>
BabyIDE is now running in Squeak 3.10.2, together with a new
Squeak Reverse Engineering tool. I want to port my programs to
Squeak 3.5
to benefit from its improved internet communication facilities. This
port has
been pestering me since April, but the overwhelming complexity of
3.5 has forced
me to accept defeat. I can’t avoid speculating about the nature of
Squeak’s current
target group. It used to be “children of all ages.” Today, it
neither includes
children nor old Smalltalk hands like me (I wrote my first Smalltalk
program in
1978). Stephen Pope, another veteran who also bemoans what is
happening to
Squeak, wrote in a blog: <br>
<br>
<blockquote><i>“</i><i><span style="font-size:12.0pt;
mso-bidi-font-size:10.0pt;line-height:107%">The most popular
systems (Squeak
and Pharo) both suffer from unbelievable image bloat, with
many thousands of
classes, hundreds of root classes, class hierarchies with many
instance
variables in the high-level (abstract) classes, and too many
packages with cute
but meaningless (to a new-comer) names.”</span></i><br>
<span style="font-size:12.0pt;
mso-bidi-font-size:10.0pt;line-height:107%">
</span><a
href="https://smalltalk.tech.blog/2020/08/10/smalltalks-successor/"
moz-do-not-send="true"><span
style="font-size:12.0pt;mso-bidi-font-size:10.0pt;line-height:107%">https://smalltalk.tech.blog/2020/08/10/smalltalks-successor/</span></a><br>
</blockquote>
I couldn’t agree more. A few examples:<br>
<br>
<blockquote><span
style="mso-fareast-font-family:Arial;mso-bidi-font-family:Arial"><span
style="mso-list:Ignore">1.<span style="font-style: normal;
font-variant: normal; font-weight: normal; font-stretch:
normal; font-size: 7pt; line-height: normal;
font-size-adjust: none; font-kerning: auto;
font-optical-sizing: auto; font-language-override: normal;
font-feature-settings: normal; font-variation-settings:
normal;">
</span></span></span>Class Object defines 485 methods. This
means
that every Squeak object understands at least 485 messages. Most
of them are irrelevant to
the problem at hand, but all of them can be part of unexpected
behavior. <br>
<br>
<span
style="mso-fareast-font-family:Arial;mso-bidi-font-family:Arial"><span
style="mso-list:Ignore">2.<span style="font-style: normal;
font-variant: normal; font-weight: normal; font-stretch:
normal; font-size: 7pt; line-height: normal;
font-size-adjust: none; font-kerning: auto;
font-optical-sizing: auto; font-language-override: normal;
font-feature-settings: normal; font-variation-settings:
normal;">
</span></span></span>The state of every Morph object is held
in its
regular instance variables PLUS any number of undeclared and
undocumented
variables in its <i>extension</i>, a Dictionary that may include
another dictionary
inside it. The Morph class comment: <i><span
style="font-size:12.0pt;mso-bidi-font-size:
10.0pt;line-height:107%">“MorphExtension Allows extra
properties to be stored
without adding a storage burden to all morphs.”</span></i> I’m
more concerned about
the burden put upon the code reader.<br>
<br>
<span
style="mso-fareast-font-family:Arial;mso-bidi-font-family:Arial"><span
style="mso-list:Ignore">3.<span style="font-style: normal;
font-variant: normal; font-weight: normal; font-stretch:
normal; font-size: 7pt; line-height: normal;
font-size-adjust: none; font-kerning: auto;
font-optical-sizing: auto; font-language-override: normal;
font-feature-settings: normal; font-variation-settings:
normal;">
</span></span></span>For me, the final straw was the new
filtering
phase added to Squeak’s already complex event handling mechanism.
Squeak 3.5
has 208 new methods with ‘filter’ in their name, but there is no
indication as
to what they are for and when to use them. The abstract concepts
of event
filtering are documented, but there is no documentation on their
reification
into concrete code. The complexity of a basically simple mechanism
has reached
a new high far beyond the capabilities of my brain.<br>
<br>
<span
style="mso-fareast-font-family:Arial;mso-bidi-font-family:Arial"><span
style="mso-list:Ignore">4.<span style="font-style: normal;
font-variant: normal; font-weight: normal; font-stretch:
normal; font-size: 7pt; line-height: normal;
font-size-adjust: none; font-kerning: auto;
font-optical-sizing: auto; font-language-override: normal;
font-feature-settings: normal; font-variation-settings:
normal;">
</span></span></span>Class MorphicEventDispatcher has 4
methods in
3.10.2 and 16 methods in 5.3.<br>
<br>
<span
style="mso-fareast-font-family:Arial;mso-bidi-font-family:Arial"><span
style="mso-list:Ignore">5.<span style="font-style: normal;
font-variant: normal; font-weight: normal; font-stretch:
normal; font-size: 7pt; line-height: normal;
font-size-adjust: none; font-kerning: auto;
font-optical-sizing: auto; font-language-override: normal;
font-feature-settings: normal; font-variation-settings:
normal;">
</span></span></span>Class <i><span style="font-size:12.0pt;
mso-bidi-font-size:10.0pt;line-height:107%">MyMorph>>
processEvent:
anEvent using: anIgnoredDispatcher</span></i><br>
is a regular event handler in 3.10.2. In 5.3, it is a filter, and
its execution
never stops. <br>
</blockquote>
<br>
After 60 years in programming, 42 of them in Smalltalk, and the
last 20 in Squeak, I have reached the end of my patience and
reluctantly have
to quit Squeak programming. It is truly a sad day.<br>
<br>
Have fun and Goodbye, <br>
--Trygve <br>
<br>
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<p class="MsoNormal"><i style="mso-bidi-font-style:normal"><span
style="font-size:10.0pt;mso-fareast-font-family:"Times New
Roman";mso-ansi-language:
EN-US" lang="EN-US">The essence of object orientation is
that objects <span class="GramE">collaborate<span
style="mso-spacerun:yes"> </span>to</span> achieve a
goal. </span></i><span
style="font-size:10.0pt;mso-fareast-font-family:"Times
New Roman";
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<span class="SpellE">Trygve</span> <span class="SpellE">Reenskaug</span> </span><span
style="font-size:10.0pt;mso-fareast-font-family:"Times
New Roman""><a href="mailto:%20trygver@ifi.uio.no"><span
style="mso-ansi-language:
EN-US" lang="EN-US">mailto: trygver@ifi.uio.no</span></a></span><span
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New Roman";mso-ansi-language:
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<span class="SpellE">Morgedalsvn</span>.
5A </span><span style="font-size:10.0pt;
mso-fareast-font-family:"Times New Roman""><a
href="http://folk.uio.no/trygver/"><span
style="mso-ansi-language:EN-US" lang="EN-US">http://folk.uio.no/trygver/</span></a></span><span
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New Roman";
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N-0378
Oslo </span><span
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New Roman""><a href="http://fullOO.info"><span
style="mso-ansi-language:EN-US" lang="EN-US">http://fullOO.info</span></a></span><span
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New Roman";
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Norway Tel:
(+47) 468 58 625 </span><span
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EN-US" lang="EN-US"><o:p></o:p></span></p>
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