Functional and Reactive Domain Modeling
Functional and Reactive Domain Modeling teaches you how to think of the domain model in terms of pure functions and how to compose them to build larger abstractions. about the technology Traditional distributed applications won't cut it in the reactive world of microservices, fast data, and sensor networks. To capture their dynamic relationships and dependencies, these systems require a different
Functional Patterns in Domain Modeling - Anemic Models and Compositional Domain Behaviors
I was looking at the presentation that Dean Wampler made recently regarding domain driven design, anemic domain models and how using functional programming principles help ameliorate some of the problems there. There are some statements that he made which, I am sure made many OO practitioners chuckle. They contradict popular beliefs that encourage OOP as the primary way of modeling using DDD princ
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（Twitterã‹ã‚‰å‚ç…§ã™ã‚‹ãŸã‚ã®ãƒ¡ãƒ¢ã§ã™ï¼‰ ã¾ãšãã‚‚ãも「関数ã€ã¯ã€ŒåŒã˜å½¢ã®è¨ˆç®—を何度も書ã‹ãªã„ãŸã‚ã®ä»•çµ„ã¿ã€ã§ã‚ã‚‹ã“ã¨ã‚’å分ã«ç†è§£ã™ã‚‹ï¼ˆã•ã›ã‚‹ï¼‰ã€‚ãã®ä¸Šã§ã€ sum(0) = 0 sum(1) = 0+1 sum(2) = 0+1+2 sum(3) = 0+1+2+3 sum(4) = 0+1+2+3+4 ...も「åŒã˜è¨ˆç®—を何度も書ã„ã¦ã„ã‚‹ã€ã‹ã‚‰ã€ sum(0) = 0 sum(1) = sum(0)+1 sum(2) = sum(1)+2 sum(3) = sum(2)+3 sum(4) = sum(3)+4 ...ã¨æ›¸ãæ›ãˆã‚‹ã€‚ã“れを一般化ã™ã‚‹ã¨ sum(0) = 0 sum(n) = sum(n-1)+n （n>0ã®å ´åˆï¼‰ã¤ã¾ã‚Š sum(n) = if n=0 then 0 else sum(n-1)+nã¨ãªã‚‹ 追記：n<0ã®å ´åˆã¯æ°—ã«ã™ã‚‹ãªã€‚
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