From info at uksmalltalk.org Sun Sep 22 15:47:42 2024 From: info at uksmalltalk.org (UK Smalltalk) Date: Sun, 22 Sep 2024 23:47:42 +0100 Subject: [GemStone-Smalltalk] UKSTUG meeting - Christian Haider: How values make systems simpler - 25 Sep 2024 @ 7pm BST Message-ID: *How values make systems simpler* Distinguishing between stateful Objects and Values has long been recognized as fruitful. Values are universal context-free abstractions that prevent side-effects and allow for a functional programming style. Though programming languages provide simple Values like Integer and String, more complex Values are usually not supported. We show how to model complex structures as Values in Smalltalk, which allows for a simple and versatile implementation. The resulting Smalltalk systems are simple, clear and easily testable. Christian Haider is the author of the PDFtalk library used in smallCharts and other projects. Underlying is a simple implementation of Values which he uses extensibly. Christian will show how Values make systems simpler and easier. Examples for some uses and the limits of the approach will be discussed. Since Values use only standard Smalltalk features, it can be used in most other Smalltalks. And all of this code is available with MIT licence. This will be an online meeting from home. If you'd like to join us, please sign up in advance on https://www.meetup.com/ukstug/events/302453141 -------------- next part -------------- An HTML attachment was scrubbed... URL: From info at uksmalltalk.org Mon Sep 23 00:40:02 2024 From: info at uksmalltalk.org (UK Smalltalk) Date: Mon, 23 Sep 2024 08:40:02 +0100 Subject: [GemStone-Smalltalk] UKSTUG meeting (*with corrected links*) - Christian Haider: How values make systems simpler - 25 Sep 2024 @ 7pm BST Message-ID: Distinguishing between stateful Objects and Values has long been recognized as fruitful. Values are universal context-free abstractions that prevent side effects and allow for a functional programming style. Though programming languages provide simple Values like Integer and String, more complex Values are usually not supported. We show how to model complex structures as Values in Smalltalk, which allows for a simple and versatile implementation. The resulting Smalltalk systems are simple, clear and easily testable. Christian Haider [1] is the author of the PDFtalk library [2] used in smallCharts [3] and other projects. Underlying is a simple implementation of Values [4] which he uses extensively. Christian will show how Values make systems simpler and easier. Examples for some uses and the limits of the approach will be discussed. Since Values use only standard Smalltalk features, it can be used in most other Smalltalks. All of this code is available with MIT licence. This will be an online meeting from home. If you'd like to join us, please sign up in advance on: https://www.meetup.com/ukstug/events/302453141 [1] https://christianhaider.de/index_en.html [2] https://pdftalk.de/doku.php [3] https://smallcharts.de/english/ [4] https://pdftalk.de/doku.php?id=complexvalues -------------- next part -------------- An HTML attachment was scrubbed... URL: