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Chris Maunder wrote: Who has a good survey question
Which function design pattern do you prefer?
[ ] Bouncer Pattern
[ ] Fail Fast
[ ] Guard Clause
[ ] Happy Path
[✓] Single Entry/Exit
Probably a few more I've never heard of. Maybe the others can chime in.
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[] Right tool for the right job
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What's the difference between guard clause and bouncer pattern?
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And the answer is "because Australia has become a totalitarian State.?
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Trying not to start the soapbox, but ...
From what I've seen in the your media, our situation has totally been misrepresented. I'm thinking in particular of one of your politicians calling for Australia to be invaded to free us - please don't.
Here in Queensland we had the big lockdown last year and a few smaller ones since. Other than that we are free to go out for dinner, movies, have weddings (my daughter got married this year), go to sporting events, etc etc. At the moment masks are not mandatory (although I still wear it on the train).
Down south there've had it a bit rougher and have had higher numbers, but with high vaccination rates these restrictions are being lifted.
// TODO: Insert something here Top ten reasons why I'm lazy
1.
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yacCarsten wrote: I'm thinking in particular of one of your politicians calling for Australia to be invaded to free us - please don't.
IIRC - It was Candace Owens (a conservative media type not a politician) and she was being facetious, she even stated as much in the article preface. I certain rather large portion of US media that openly supports the opposite end of the political spectrum misrepresented her.
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There's an election next year so let Australians decide what they think about it all, overall, instead of throwing out cheap labels. Every country has made their own decisions and there will be decades of post-doc theses full of 20/20 hindsight on who did what best.
cheers
Chris Maunder
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Germany had election some weeks ago... Guess what? We are about of getting locked down again.
Politicians in pre-election months where rushing to re-open everything to get "likes" from the voters... Now we are in worse situation as at the beginning, having every available resource but still with the worst statistics ever...
Chris Maunder wrote: who did what best.
And as always... that will be very dependant on who is on charge while they are writing it.
M.D.V. 
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpful answers is nice, but saying thanks can be even nicer.
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History is written by the survivors.
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Home, sweet home. 
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I am looking for a business rule engine(open source) in .NET.
any recommendation/experience to share?
diligent hands rule....
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Roll your own. Only you know exactly what you want/need.
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it seems like I need to build a parser for these rules too...
diligent hands rule....
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The rules already exist? I'm confused.
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If you do intend to go that route let me know, and let me see a sample of your rules, and I'll whip you up an XBNF grammar you can either use with one of my parser generators, or as a guide to implement a recursive descent parser on your own. I'll even recommend which route to take, and which tools to use depending on what your rules wind up needing to look like.
Real programmers use butterflies
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thank you for the offer and definitely check with you! I browsed your post.
diligent hands rule....
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You can use that one but it's a bit dated.
When you're ready for it, assuming you're targeting C#, I'll hook you up with Norm and Reggie (or Parsley and Rolex depending on what you want)
They are quite a bit more mature than PCK, although PCK does have a syntax highlighting editor. In practice, that isn't very helpful which is why I haven't included it in more recent projects.
Real programmers use butterflies
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in a simple example, my dataset is a List of data points(2D such as x,y)), I want to detect at which point that reach local max , local min etc..
I created a table associated with this dataset and calculated all needed mathematical attributes such as derivatives at each point.
so I want to use type of rules in natural language like that describe and evaluate my request: max(my_List).
hope my explanation is clear. I have not done anything on business rule stuff.
diligent hands rule....
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Parsing is like 10% of natural language processing. I'm not sure you know what you're getting into.
The other problem with doing it for business rules is ambiguity. Do you want that ambiguity leaking into your accounts receivable tables? Because this is how it happens.
The quickest dirtiest way to get natural language processing into your business rules is to use Amazon's voice recognition services, and then plug it into a rule writer based off of that.
Then take that rule writer and plug it into a system you do not care about, because it's not going to give you anything good, particularly given that the type of people who would require natural language processing to produce business rules lack the analytical chops to craft solid business rules in the first place.
Real programmers use butterflies
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Fair enough, although if you're really committed to natural language parsing, Glory: A GLR Parser Generator for .NET[^] is what you'd need for that, because of the ambiguity. PCK can't parse natural languages, and extending the algorithms therein to do so is non-trivial, so it won't make a good starting point necessarily.
Also, avoid the LALR(1) generation in PCK. It's slow and I don't think it handles epsilons correctly. Glory does.
Real programmers use butterflies
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I don't even see any low-hanging fruit there.
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I did this research already. just check around if any better ideas exist...
diligent hands rule....
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