Starting with a some rabbling while reading the source of elixir eventstore My original idea was to first start with some event storming and then go into programming. But I think it will be very important to have a very clear structure for this workshop so that everyone can follow. Not only that, it will also be very to have a why would you do that. When starting with event storming, maybe we are missing some basics. »
Well, that was a blast. DDD Europe 2018 is already over. And I loved it! Because I had lovely conversations, great insights and good learnings, I had the idea to create a summary, mostly for myself. Pre conference workshop DIY Event Sourcing Tooling A pre conference workshop by Marijn Huizendveld on Tuesday and Wednesday. This workshop about making your own event sourcing tooling was not exactly what I expected it to be. »
In this post I’m exploring some ways of modelling aggregate boundaries in an event sourced system. This is mostly to crystallise some thoughts that I had after some event storming sessions, but it might be interesting to someone else. The domain I’m using in this post is the domain that Michel Grootjans and I have created for the workshop Playing with projections (We already gave it a few times, for example at DDD Europe and will also give a session at I T. »
After reading the blog post of Mathias Verraes (@mathiasverraes) on (Type Safety and Money)[http://verraes.net/2016/02/type-safety-and-money/], and after doing a real short modelling attempt in Haskell at Socrates Belgium, I wanted to try to model Money in Elm. I don’t want to go to deep and too far so I’ve set some basic constraints for myself: You cannot add money of different currencies (you need an explicit conversion) - Add constraint We also want a Price. »
Introduction Iteration 1 function getSymbol(symbolName) { return 'replace'; } function escapeRegExp(string) { return string.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, "\\$1"); } function SymbolReplacer(s) { this.alreadyReplaced = []; this.stringToReplace = s; } //iteration 1 https://sites.google.com/site/unclebobconsultingllc/one-thing-extract-till-you-drop SymbolReplacer.prototype.replace = function() { var symbolPattern = /\$([a-zA-Z]\w*)/g; var matches; while (matches = symbolPattern.exec(this.stringToReplace)) { var symbolName = matches[1]; if (getSymbol(symbolName) !== null && this.alreadyReplaced.indexOf(symbolName) === -1) { this.alreadyReplaced.push(symbolName); var toReplace = new RegExp(escapeRegExp(matches[0]), 'g'); this.stringToReplace = this.stringToReplace.replace(toReplace, getSymbol(symbolName)); } } } var x = new SymbolReplacer('dit $is een $test $test $test $is $complex gewoon woord'); console. »