The Whiteboard

Robert Harvey

8:00 PM

@korima Those don't look like derivations; they look like composition. Are you sure we're talking about inheritance?

SRP is just a principle, not a programming technique. Don't get caught up in cargo cults.

korima

@RobertHarvey What do you mean with derivations?

Robert Harvey

That was the word you used. You said "derivated classes." I assumed you meant "derived."

korima

Ammm sorry. Yes, derivated because they help to the main to achieve the goal, no?

Robert Harvey

@AshleyNunn Filed under the category of "Things not to put in blog posts": "I am putting some random pictures in my post, because Jeff Atwood said so. This is my dog Taco. Say hello to Taco."

@korima So basically you mean "related."

user15026

I only like pictures if I need them to explain a thing, like in food blogs

user41796

8:03 PM

Or if they involve cats?

Robert Harvey

Cats are always OK.

user20683

@GlenH7 Cats always need explaining

Robert Harvey

That too.

korima

Yes, related, because they achieve a goal together

@RobertHarvey You mean that I should put in differents folders?

Each one with his purpose?

And no mix in the place where they are used?

Robert Harvey

@korima You should know that helper-classes are considered a bit of an anti-pattern. Unless you're doing something like functional programming with helper methods (e.g. Linq), or your utility class is general purpose (like a Math utility class), your methods probably belong with the associated classes, not in a utility class.

There are reasons why you would have utility classes, but some people reach for them when they should just put a static method in an ordinary class, or use a factory, or somesuch.

SRP is a very misunderstood concept. If you want to understand it better, read Bob Martin. He explains it better than anyone, within the context of Clean Code practices.

user15026

8:08 PM

@GlenH7 Yes, or trains.

Robert Harvey

Or cats on trains.

korima

@RobertHarvey I have read a lot but I cant advance because the examples i read are the same :(

I would like to see other differents with other scenarios

Robert Harvey

What is the example?

korima

Employee, WeatherStation... but i dont find any with a window form for example

Robert Harvey

Seriously, though, does anyone use Codility?

user41796

8:11 PM

@RobertHarvey We don't, no.

user41796

But we're pretty small in the developer world

Robert Harvey

But it might be useful to get better at these programming tests, yes?

I'd have to fake a company email address, but that would be easy enough.

user41796

@RobertHarvey Are you referring to this section? codility.com/programmers/lessons

Robert Harvey

@korima Read the example here (below the MVC stuff, the second section):

28

A: Isn't MVC anti OOP?

MVC is an exercise in Separation of Concerns, a UI architecture. It is a way to corral the complexity that can occur in user interfaces due to the presentation not being separated from the content. In theory, all objects can have behavior that operate on the data they contain, and that data a...

korima

@RobertHarvey Ok, thanks. I will see now.

Ampt

8:14 PM

@GlenH7 yes, you need starsan

user41796

From a broader point of view, yes, working on programming challenges is a good idea for job candidates

Ampt

for stuff you can't don't want to boil

aka inside of carboy

user41796

anything that helps you deal with more challenges / puzzles / ad-hoc type stuff like that will help make you more confident during actual interviews.

Robert Harvey

@GlenH7 Ah, didn't realize Codility actually had a study guide.

user41796

@Ampt okay, that makes sense

user41796

8:15 PM

@RobertHarvey took me a bit to find it too

Robert Harvey

Why would they advocate for employers, and then publish a study guide? That doesn't make much sense.

user41796

I think Codility's paid-for side is strictly to create puzzles, whereas you want puzzles to work on

user41796

@RobertHarvey Because employers make their own tests

Robert Harvey

Oh. Didn't know that.

So really, it's just a platform.

user41796

I'm guessing it's not a set battery of N tests, but an "infinite" field that employers use to suit their needs

Robert Harvey

8:18 PM

That's genius. One guy could put up a platform like that.

That's what I need. Some "one guy" ideas. Though I think the days of one person making a lot of money selling software he's written personally are probably gone.

korima

@RobertHarvey Ok, I understand the concept of agent but how I apply to the scenario I put as example (RssReader). How organize the files in my package?

user55340

My nephew is apparently really liking those smartmax building system to make trains.

korima

Creating something like this: business/ResourceNetwork (Contains all agents about access internet resource) business/rsschannel/downloader(Contain downloader agent) business/rsschannel/documentparser (Agent for xml parser)

My problem is organize my package files. I dont really know where to put them

Robert Harvey

That's a minor detail. Put them in a single folder, unless you have dozens of them.

korima

Oh man, I think must rest. My brain is going to explode. Thanks for all Robert

Maybe sleep help me to see the things more easier xDDDD

Robert Harvey

8:24 PM

@korima The answer to folder organization questions is always the same: organize the folders in a way that makes sense to you and makes things easier to find. That's it.

korima

@RobertHarvey I guess... Thanks one again

Well guys, I must go. Good night!!

Daniel

Could someone help with design question? chat.stackexchange.com/rooms/18846/…

Robert Harvey

Wait, what?

What is that? A Chat Room with an enormous description?

Daniel

This is actually content of my question asked on Programmers site, but it was immedietaly downvoted...

Robert Harvey

That's not a good sign.

Daniel

8:28 PM

Yeah, I know, but it's hard to find experts in these kind of technologies.

Robert Harvey

There is no "best way". There is only the way that most effectively meets your software's functional and non-functional requirements.

user20683

The only way is "does it work?"

user20683

if not, keep working on it

user55340

(original question post (10k link): programmers.stackexchange.com/questions/263366/… )

Robert Harvey

And if you're expecting someone to walk you through the entire design process, you're barking up the wrong tree.

Daniel

8:29 PM

I'm not a beginner, but I still need to ask some questions to SPA expert.

Robert Harvey

Make them specific.

user15026

I wrote a thing! It is very likely crap. But that's okay!

Robert Harvey

@Daniel The answer to the question you put in that other chat room is "Learn SPA."

user41796

@Daniel Your question is overly broad - you could write a book about the various things you're asking about. Short answer, Angular.js should be fine for what you need. Ember should work too. Pick the one that appeals to you more.

Daniel

Ok, but I haven't found any examples on designing chat with Ember.js and eg. SignalR.

user41796

8:32 PM

Then use Angular and move on with your application

Ampt

@GlenH7 sorry... we're having a... disagreement over our cutover to the new environments tomorrow

Robert Harvey

@Daniel SignalR is all about chat and real-time communication. You haven't looked hard enough, or you have poor Google skills, or you just want someone to hand you some code.

Ampt

some people don't think we're ready... despite having sent out emails on monday about the downtime and cutover

user41796

@Ampt no worries. RL can sometimes interfere with more important things...

Daniel

No @Ro

Ampt

8:33 PM

@GlenH7 Like Beer.

user41796

@Ampt And brewing beer

Matt Giltaji

@AshleyNunn needs moar cat pictures

Robert Harvey

The Whiteboard always gravitates back to alcohol, eventually. It's like a gravity well.

user15026

@MattGiltaji So picky.

user55340

@MattGiltaji Must pay the cat tax.

Ampt

8:34 PM

@AshleyNunn Embedded systems 4 life

Daniel

All articles about chat that I viewed mentioned just chat for everyone. I need smaller chats only for friends etc. I haven't found anything that would make me to tell: "yeah that's this idea".

user15026

@Ampt I just like I know what that -means- now, for realsies

user41796

@RobertHarvey Still, that's better than leftover well shots. Blech.

Robert Harvey

@Daniel What data store are you going to use? Most databases are capable of separating conversations; it's a set theory problem.

user55340

Me and my cat.

Robert Harvey

8:36 PM

Translation: You may need to read some more books.

@MichaelT Holy cow. That looks just like my cat.

user55340

@RobertHarvey Black cats have a tendency to do that.

Daniel

@Robert Harvey question is more about how to protect SignalR or use this only for 2 people, how to make it unique. I don't know how to express it well.

user41796

@Daniel Authorizations at the service layer

user41796

And use a queuing system to distribute messages

user41796

rabbitmq is worth looking at from that point of view

Robert Harvey

8:37 PM

@Daniel The posts have to be stored somewhere, unless you just plan on transmitting them without storing them. Stick a user ID on the message, then you'll know where to send it.

user41796

and use a topic exchange so you can specify routing of each message

Daniel

@GlenH7 Could you tell me some more, chat should be clone of facebook's one.

Robert Harvey

@MichaelT I'd post a picture of mine, but... Well, just look at your cat. She looks just like that.

user55340

@GlenH7 as long as you're not getting rag squeezing in a shot glass.

user41796

@MichaelT oh jeeez, that's worse

Ampt

8:38 PM

@AshleyNunn you should get one and make it do stuff!

user15026

@Ampt That is very tempting

user41796

@Daniel I've already given you as many pointers as I can afford the time for today

user55340

@GlenH7 I recall it being "free special" at a college bar... well... back in college... when health inspectors weren't quite so strict.

Daniel

@GlenH7 Okay, thanks. I'll look into rabbitmq.

Ampt

@GlenH7 back to beer?

user41796

8:38 PM

go look at rabbitmq. use angular; it meshes well with signalr

user15026

I keep eyeing various bits but I am not sure where to start or what is decent for someone who has no idea what she is doing

Ampt

@AshleyNunn Arduinos are fuuuun

user55340

And no... I was never that drunk nor that desperate nor that poor.

user41796

@Ampt Mmmmm, gonna need a beer

user41796

Working on some WTF code... :-(

user15026

8:39 PM

@Ampt They do seem fun!

Daniel

@Robert Harvey So I can choose which clients are members of SignalR communication?

user15026

I just don't know where to start!

Robert Harvey

@Daniel You can do anything you want. Your a programmer.

user15026

@MichaelT Good, because ew.

Ampt

@AshleyNunn step one: buy one. step two: get some cool stuff like servos and LEDs step3: do fun stuff

user15026

8:40 PM

@Ampt Well, that answers that :)

user55340

@AshleyNunn my brother sent me this link: studio.code.org/s/frozen - fairly sure it won't be that helpful to this situation.

Robert Harvey

My head hurts. Somehow this room has become about homebrew controlled by Arduino using SignalR.

Daniel

@Robert Harvey Ok thanks, but lots of problems and I'm alone. It will be challenging for me to create some API with Ember + SignalR to chat.

Robert Harvey

@Daniel Start small. Build little things that work. Teach yourself enough about it to have confidence that you're doing it the proper way.

user41796

@MichaelT that's kinda cool

user55340

8:42 PM

(ghads... this got bounced and I have an expired close vote on it...)

user55340

22

Q: Why the question "give five things you hate about C#" is so difficult to answer during an interview?

In podcast 73, Joel Spolsky and Jeff Atwood discuss, among other subjects, "five things everyone should hate about their favorite programming language": If you’re happy with your current tool chain, then there’s no reason you need to switch. However, if you can’t list five things you hate abo...

c# interview

user41796

@Ampt Any reason why I shouldn't start with a stout?

user20683

our initial project for raspberry pi was "use GPIO to light up LEDs in a counting sequence"

Ampt

@GlenH7 because you can't handle the truth?

user20683

manageably small

user41796

8:43 PM

@Ampt The truth that I'll likely mangle the first batch? I think I can get over that

Ampt

@WorldEngineer I haven't tried doing low level stuff like that on the rPi... I like the little atmel and microchip chips

user15026

@MichaelT No, but I like it anyhow

Ampt

@GlenH7 no, that you'll never be able to drink store beer again.

user20683

@Ampt lies

Ampt

(I'm kidding on that part... it just tastes so much like water)

your beer will literally taste... thicker. because filtration is for people who have to meet FDA requirements

also, when doing a tracert and one of the lines times out, but keeps going on the next hop

what does that mean

user41796

8:44 PM

@Ampt I'm OK with that. Truthfully, I'd like to have enough beer & wine at various stages of brewing that I don't have to buy from the store unless I want to

user55340

@Ampt blue honey mead!

user41796

@Ampt intermittent connection issues

Ampt

@GlenH7 that's pretty much where we're at

@GlenH7 I mean all 3 attempts bomb out, but it gets to the next stage just fine

how does that work

user41796

Could be a misconfigured router that's shunting particular packets the wrong way

user41796

remember that packets have a TTL built into them

user41796

8:46 PM

I'd be willing to bet that something is looping the packets so they end up dying, but something else in the chain picks that up and gets the packet delivered

user41796

But you're at the limits of my networking knowledge

Ampt

huh... yeah... this is really weird...

so we went and mapped an IP to a server over at our favorite hosting network

but.. that IP is already owned by someone else and is used as their mail server

but... we can get to it from the outside

like we go to that ip and get to OUR server

user41796

oh

Ampt

yeah..... it's really, really bizzare

user41796

The rules get different when you've got IP addr conflicts like that

user41796

8:48 PM

which is why you're not supposed to allow conflicts

user41796

easiest way to fix the problem is to grab another IP addr

Ampt

yeah.. but how is it resolving at all?

user41796

and it makes sense that you can get to it from the outside if their boxen isn't exposed to the outside

Ampt

is it just that two servers are both waiting on that IP

but only ours is listening on 80?

user41796

correct

Ampt

8:49 PM

that's fucked up.

user41796

I think a router will duplicate and push a packet to both systems with the same IP

Ampt

there look to be many, many routers between us and them

user41796

Because to the router, the system is just a connection hung off of its physical ports

user41796

right, but the last one touches both your system and theirs.

Ampt

ah, so the closest one to us touches them both... got it

and by us I mean my laptop infront of me

user41796

8:51 PM

and to the router, your server isn't 127.0.0.1 but rather q4359asd752, which is its port number for the "physical" port

user41796

virtualization screws that up a bit further, btw

user41796

but all major virtualization servers provide an internal, software router that provides the equivalent functionality as a physical router with physical connections.

Ampt

yeah... this is weird and wrong and messed up and not my problem

back to rsync

user41796

yeah, change your IP if you can

Ampt

yeah we will

just... odd that it worked for so long

user41796

8:52 PM

or get the folks who own the other server to change

user41796

And ask your provider how in the heck they allowed two groups to get the same static IP

Ampt

@GlenH7 lol they have probably owned it far longer than we ever even knew we needed one

user41796

I like how AWS handles that. You click a button to allocate a static IP. Once you do that, they allocate it to just you until you explicitly release it.

user41796

All done within the mgmt console; no need to interact with their staff at all.

Ampt

aha... we DO own that address

they're the ones who are mooching!

interesting!!

user41796

8:56 PM

I'm assuming it's a completely different organization with the conflicting server?

user41796

If so, call up the virt provider and ask them to fix the issue.

user41796

Realizing that they have such a speedy response time... :-(

user41796

OTOH, if it's trivial for you to switch to a new IP then just do that.

Jimmy Hoffa

@Ampt Did you say this is an email server? That sounds terribly close to what someone would do if they wanted to do some illegal shit...

user41796

I'm not a big fan of getting into a protracted shouting match when I can quickly fix the issue if it's zero cost to me.

user41796

8:58 PM

@JimmyHoffa That's true too

user41796

good way to snoop for email going to the "original" server

Jimmy Hoffa

Not saying they are doing it for that purpose, but when you see things like that you have to start being wary lest you be the one holding the bag when some shit happens and everybody asks why the system wasn't secured

in other words, you may wish to raise flags just to CYA. Paranoia regarding stuff like that is appreciated in many orgs (not all, some disappreciate it, some shrug and keep on keepin on)

user41796

@JimmyHoffa You're raising some good points, tbh. It's not unheard of to think that his employer is an active target. And some of their clients are definitely active targets

Ampt

@JimmyHoffa no, THEY are running an email server on it. We're running a mail server

user41796

@Ampt both of you are?

user41796

9:03 PM

and how long have you had a server there?

Ampt

Sorry, We're running a web server

typing hard talk same time

we're dealing with that now

yeah, I doubt its that

user41796

Given your other comments, I'd suspect human error

Ampt

yeah thats what were going on now

holy crap i need a beer

user41796

Well said

user41796

Doesn't visual studio have some sort of evaluation window so you can quickly test the syntax of something?

user41796

9:16 PM

specifically, I want to see what String.IsNullOrWhiteSpace(""); returns

Jimmy Hoffa

@GlenH7 not for C#, fsi is what I use for that: though F# scripting requires ;; to end a statement or block rather than a single ;

Ctrl+Alt+F for FSI pane

user41796

@JimmyHoffa Thanks, I'll throw up another project and test there.

Jimmy Hoffa

project? Negative, it's just a pane.

user41796

I can test a C# call in F#?!

Jimmy Hoffa

It's just .net :P You have to fully qualify things in the FSI pane though unless you explicitly "open" them (like a using statement): open System;;

then your above statement would execute directly, otherwise it would be System.String.IsNullOrWhiteSpace("");;, if you open System;; first, then I think you won't need the full qualification

I use FSI for testing String.Format crap all the time to see how to get DateTime or currencies formatted correctly etc

user41796

9:20 PM

You're correct - once I used the open System;; call I was able to test that String func

user41796

and my head is exploding

user41796

that's a really cool feature

user41796

@JimmyHoffa makes sense, yep. Much better than just guessing

Jimmy Hoffa

been there quite a while :) F# inherited a cool thing from it's O'Caml roots: Intentional support for scripting

user41796

would it be close System;; to stop using it?

Jimmy Hoffa

9:21 PM

I don't know how you would unopen something, or if you can... I think it like a C# using statement, you never end a using statement

user41796

ok

user41796

and I think I like .IsNullOrWhiteSpace() more than I like .IsNullOrEmpty() as it checks for 3 conditions instead of just 2

Jimmy Hoffa

if you want a variable to mess with you can let foo = "bar";;or let quux = 3;;

@GlenH7 yeah, I stopped using IsNullOrEmpty ages ago

user41796

I'm replacing a foo.Length == 0 check....

Jimmy Hoffa

rarely do I intend to check if something's empty but whitespace is ok, so IsNullOrWhiteSpace is my first reach

Jimmy Hoffa

9:56 PM

gra the dissonance between FP and OOP is so much, trying to make OOP stuff behave in an FP manner just completely forces you to rewrite it... people who claim multiparadigm means you can use both are spouting nonsense, this is just their motte, their bailey is "OO is the best!"

Ampt

@JimmyHoffa yes... yeess... let the Objects flow through you!!!

Jimmy Hoffa

truth in fact is that everyone who learns FP no longer bothers with OOP. And the two are not intermixable grumble... I'm sitting here debating retrofitting a nice FP api on this validation class we have so you could

 SomeValidator(someField)
.OtherValidator(otherField)
.AnotherValidator(anotherField)

but to do so would totally break all the compatibility with every bit of code currently using it because the OOP fashion this thing is designed makes it not nicely maneuverable into that interface

so you're stuck imperatively rooting after one validator and another and checking results for each one manually instead of letting it generically handle the validation result collection for you

Ampt

You know... I think there's a pattern for this...

Jimmy Hoffa

@Ampt I'll bait ya right back: Let's see it :) I wonder if there actually is anything that OOP has proposed to do anything like monadic composition, I've not seen such

above I'm basically referring to a WriterT Either

Ampt

What about the decorator pattern?

Jimmy Hoffa

10:06 PM

@Ampt I presume you're joking? Not sure..

Ampt

@JimmyHoffa well.. if you just want to keep modifying one object with subsequent calls, that's what the decorator pattern does

I just kind of glanced over your method signature

is that not what you're doing?

Jimmy Hoffa

@Ampt negative, the decorator pattern is where instead of inheriting from a class you make the class a member (field or property) and intercept it's methods so that you can meddle with them before they make it to the type

or add methods that do more stuff below

nah, I'm referring to adding a fluent composition API where each call returns a result that lets you chain another call on. Right now all the validators are floating static instances so they can't be chained, which is a perfectly proper way to declare your validators if you're doing OOP

I'd have to seriously screw with the class to make them chainable

and likely break the compatibility with everything that touches them as it is

Ampt

@JimmyHoffa so you always return the type of whatever you're calling it on... right?

psr

@maple_shaft O.K. Possible solution. Probably really a partial solution. You need to get a single blank ticket kind of project approved, like a really vague POC. It needs all the software you can think of ever needing and it never actually ends. All your actual POCs are just small parts of the One Project To Rule Them All, and therefore already approved. You could probably at least get a Java stack this way.

Ampt

so if you do a.somemethod() you expect somemethod to return an a right?

user41796

10:10 PM

@JimmyHoffa High risk for marginal benefit - personally, I wouldn't do it.

Jimmy Hoffa

@GlenH7 yep. Not doing it. :) Just stinks how OO stuff makes things inflexible in this way...

user41796

OO arguably provided benefits over structured programming. It didn't claim to solve all of programming's ills.

Jimmy Hoffa

@Ampt indeed. This is not something I've seen in OOP, closest is the builder pattern which is akin to a Writer but it has a very specific approach

Ampt

@JimmyHoffa that's... what the decorator pattern does?

Jimmy Hoffa

@Ampt ...no...

Ampt

10:14 PM

a.decorate() returns an a, so that the subsequent methods can be called on it

Jimmy Hoffa

@Ampt no it doesn't

Ampt

a.decorate1().decorate2() is the same as a.decorate2().decorate1()

yeah... it kinda does

Jimmy Hoffa

no it doesn't

user41796

The upside of dealing with WTF code is that it's really easy to nail your daily metric of "how many lines of code did you remove?"

Jimmy Hoffa

public class MyFileWriter : IWriter { public void Write(string something) { [...] } }
public class MyFileWriterDecorator : IWriter
{
  private MyFileWriter _thingBeingDecorated;
  public void Write(string whatever) { /* do some custom shit then: */ _thingBeingDecorated.Write(whatever); }
  public void SomeExtraCrapDecoratedOntoTheFileWriter() { [...] }
}

^-- decorator

not sure what you're referring to @Ampt ?

decorator pattern let's you put little things on top of another type; decorations

Ampt

10:18 PM

hold on, I don't have my textbook here so I'm going from memory but I thought there was a pattern that did that

Jimmy Hoffa

@Ampt perhaps? I am curious to hear about it.

It's not really an OO approach. Closest is Builder pattern

Ampt

maybe it is the builder pattern...

I'm gonna have to dust off that book when I get home

I remember the underlying principle being that every method call always returned the object it was calling on, so you could chain up a bunch of stuff since it always returned itself

Jimmy Hoffa

@Ampt remember though: Builder pattern is for a particular narrow purpose, it doesn't as a rule have the flexibility to do much more than basic accumulation.

Ampt

yeah... and I don't remember it being tied down by having to call build on it... maybe I dreamed this thing up

Jimmy Hoffa

@Ampt That's known as a "fluent" interface, but the OO approaches are usually naive doing void operations (side effects) and then return this which doesn't really get you the proper composition you want (no branch rewind or culling et al)

user20683

10:25 PM

decorator applies some functionality to one instance of an object

user20683

think italics or similar

Jimmy Hoffa

@WorldEngineer yes, as above, the one instance is the member, could be handed in through constructor or instantiated at construction or however else.

psr

You just keep returning one object, so that's Singleton, right?

user41796

^^^ Well played

Jimmy Hoffa

10:46 PM

@psr negative, const

psr

@JimmyHoffa Constant would just be the implementation of a Singleton. Just as would be marking it volatile so the compiler doesn't mess with it.

O.K., besides pretend ignorance, my actual ignorance is getting a little frustrating. If I knew functional programming better I could have a lot less state to manage in my current node app. I'm getting some benefits from JavaScript as a functional language but I'm more or less writing C# 4.0 or so in JavaScript.

Jimmy Hoffa

@psr If you need state, create a closure that binds it, if you need more, create more closures. Continue creating and executing or returning closures which hold your state.

The GC will let it all float away. Closures allow each bit of state to be as localized as possible

psr

@JimmyHoffa I actually do that already. But it seems pretty equivalent to an object with private variables - no particular improvement.

Jimmy Hoffa

@psr local is not private-> local is not accessible outside the scope of the executing function(){}

key is using parameters so everything comes in through them. What "state" is being so troublesome?

Just having lots of params etc?

The real fun is when the function needs to call itself so you hand it to itself in it's param. Referential transparency: Only parameters are available

Javascript allows you to access parental scopes naturally but it's dangerous and wholey avoidable

Matt Giltaji

11:04 PM

@JimmyHoffa massive arg object can help with that

Jimmy Hoffa

@MattGiltaji most definitely

was going to be what I suggested heh

Matt Giltaji

fooling around with the localstorage APIs in JS is where I started to really understand how useful FP can be

user20683

APL is a good demo for just how absurdly powerful it can be

user55340

@MattGiltaji Go dig up the "Clojure is the new C" video I linked a bit ago... its a good talk that gets into some functional concepts.

psr

@JimmyHoffa At this point, nothing. Mostly just worrying because I can do OO design but I'm new to functional design. So far it's been keeping it simple and solving things as they come up. The result has looked fairly close to OO, which probably cuts the chance of painting myself into a corner, but then makes me wonder if I'm missing opportunities.

In any case, it's becoming clear I don't really have a reasonably answerable question here, even for chat really.

Jimmy Hoffa

11:17 PM

@psr haha FP comes in handy when you see repetition more often then not, like the validation stuff I mentioned above. If you aren't doing boilerplate or repetitive things then you're probably just handy dandy. Start to wonder when you start to do similar things multiple times, otherwise enjoy the learning

if you find yourself writing much complex conditional logic or coming up with implementation patterns (always check X at the beginning or end of functions for Y), these are things FP can give much nicer APIs for. Otherwise just stay away from JavaScript's "type" system, don't new stuff unless it's a demand of a 3rd party API, and don't try inheritting shit. And don't use this

user20683

functional design largely comes down to figuring out what your data at the start looks like and what it should look like at the end and then figuring out how to filter it down

user20683

Haskell design usually starts with defining the types of the various stages

user20683

Sum:: [a] -> a

Jimmy Hoffa

aye, and identifying participles of that filtering so your algorithms can be componentized i.e. how map requires part of it's algorithm to be handed to it to avoid duplication

so that you can sum = foldl1 (+)

Matt Giltaji

11:36 PM

@MichaelT the content is good, but the presenter rambles a lot and the volume keeps fading

user55340

11:47 PM

@MattGiltaji Note that the presenter there is Robert Martin... who, well, I enjoyed his ramblings.

user55340

Robert Cecil Martin

Robert Cecil Martin (born 1952), known colloquially as "Uncle Bob", is an American software consultant and author. Martin has been a software professional since 1970 and an international software consultant since 1990. In 2001, he initiated the meeting of the group that created agile software development from extreme programming techniques. He is also a leading member of the software craftsmanship movement. He founded Object Mentor Inc., a consulting firm that specializes in training their clients in C++, Java, OOP, patterns, UML, agile methodologies, and extreme programming. From 1996 to 1999...

user55340

amazon.com/Clean-Code-Handbook-Software-Craftsmanship/dp/…

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