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hey everyone uh I just wanted to to do a


quick follow-up uh after presentation of


Chris presentation uh he created a


repository and I uh helped him quickly


draft the uh all the advices from the uh


his presentation into this repository


and this is a follow-up I strongly


invite you to go there if you have issue


with that maybe we can solve it all


together if you have like a good


solution uh good Silver Bullet for


improving test speed then please share


and that's it


foreign


[Applause]


I was just encouraged to


[Music]


give you a hint on something that you


might want to


introduce in your everyday workflows or


behavior in the project and think that


it's a simple takeaway that you you


could greatly


see your clients benefiting from it and


the thing is called blameless


accountability I've learned about it in


one of the


episodes of stack Overflow podcast


um the thing was that uh


there were some guests


um


marketing some tool which I'm not


marketing right now because I cannot


even recall the name but the thing was


that uh what


um


is


generally perceived as valuable for a


client when we react upon some


um


failure uh in production is that we


um


act as quickly as possible we through


all resources to overcome the the


failure and fix it as quick as possible


but we do not inform anybody about that


especially the client so because we're


perceiving it as


um


it is good enough that we just act on it


without telling about that and it is


actually false what and the metric for


for this uh what people usually do is


mean time to resolve


we Developers


tend to think that this is the thing


that


makes the client uh the most happy but


the truth is and the some research uh


backs it that what


is


even more important and it actually


costs us nothing is to


that the metric would be a mean time to


respond so


before we


get our hands dirty and jump into the


console we just


notify the client that hey somebody's


working on that


um


and I get a feeling I started to


uh


implementing it so that if if there is a


some problem or even a request it


doesn't have to be uh I don't know


database is down but there is a


something some request from client you


can just uh react on slack or just write


short message I'm on it and I get a


feeling that the NPS score and overall


client satisfaction with


um much better since I started doing


that and


I I can recommend to to start doing that


I believe that in your new next


uh


peer review or next uh MPS probe it will


be reflected and actually that's it


thanks


[Applause]


I don't know how to use it but


how to find Mentor or mentee yesterday


was presentation about mentoring so


inspire me to say how to find it and uh


I heard when you start with GIF it's


much easier so there is much to learn uh


still to have and the first thing where


you can find Mentor Elementary is the


company and I'm the from I'm from


Monterey and I should say this is the


easy way join us but we have a really


awesome blog post how we are doing


mentoring from both sides how to be a


mentor or mentee but and you can read it


and maybe Inspire and do something


similar in your company because this is


not only wave and you can do it your own


way but there are a lot of services


external Services where you can find


your Mentor or your mentee and for


example my face is on this side it's


coding coach IO and there is really good


place to find people after some boot


camps or self-learned people to


mentoring I have


or right now I have one mentee from this


website and in past I have few of them


so if you want to find some someone to


mentoring it's really good site but


there is also mentoring Club where you


can find people from services like


Netflix Google


meta when you I think on


our way it's much experienced people and


you can discuss a lot of stuff which


could help in your


current work there is also Plateau but


as I know Plateau cost


over 200 dollars per month and this is


money for Plateau not for mentors so


probably it's not a good place to to use


so but remember the money is for Plato


not for mentors but also there are a lot


of place places where you can be a


mentor there is variety there is Tech


leaders and probably much much more


groups where you can mentoring or find


mentors


and I'm tobesh vashek and you can find


me on LinkedIn so if you have any


questions


I probably can help you and once again


I'm from Monterey and tomorrow we host


the drag so this is local Ruby group and


tomorrow at 7 pm in our office it's this


meeting so thank you


[Applause]


[Music]


so hey again


um I wanted to talk a bit why


password validation on the website often


sucks


uh


I mean everyone so probably like


this you need a special character we


need the uppercase lowercase letter


numbers blah blah blah


if you are using password manager that's


not a problem and you should be using


one but if you believe everybody will be


using one I don't know the world you are


on but I want some


um


the problem with that is


users are lazy and they came up with


something like the first passwords on


the list


eight passes all validations


it has lowercase uppercase number


special character it's at least eight


character long


but I think you can all agree it's weak


password


and the second case uh is a sentence


it's easy to remember


and


it's much much more secure the first one


and yet it doesn't have special


collectors it doesn't have numbers


so it will not pass the validations on


that site and just and so I'm not empty


minded


there are programs to validate password


strengths and


I'm always joking than 100 tries per


hour is sending it to India so somebody


can solve the back route for you on on


paper


uh so it's still 10 minutes


and


yeah


you are not waiting for this to be


cracked


so what's the solution and why is it


important so as I said uh users will


always with that type of validations try


to hack it they will replace s's with


dollars and replace o's with zeros and


those rules are very very very easy to


implement in cracking software all of


them support it of the box you can run


hashgrad


it's a cracking hashes software that


supports almost anything you go with


basic dictionary just run it with


defaults and it will crack things like


that in milliseconds


so


a great project to use is that


xcvbn which is terrible name in theory


we'll get back to that uh it's a Dropbox


project which is originally in


JavaScript but has bindings in almost


everything will be included


and it returns


score from 0 to 4. so you can represent


it like that on your side so you don't


tell user wall is wrong but they know


when it's good enough


and to remember the name that's just the


lower row of your keyboard without M I


don't know why they skipped am but they


did thank you very much


good I don't know what time it is uh I'm


a bit far from home uh so I am from


Zimbabwe or I guess I need to


uh change slide so


yeah so Zimbabwe we've uh it's quite an


interesting country


um I am not black which is surprising


they are white people in Africa believe


it or not


um oh I don't know what's happened uh I


apologies


the the Linux is the solution not the


problem


uh sorry about that yeah that's the user


error not Linux error


um so yeah this is Zimbabwean currency


in 2008 and 2009 on the left hand side


um so I think I may have been one of the


youngest billionaires in history


um there was about 16 million


billionaires that's the population of


Zimbabwe uh so yeah we there was quite a


few billionaires uh in in 2008


and on the right hand side we've got a


couple days ago


we've got a rate of we've got a couple


currencies we've got four current season


Zimbabwe one is card currency and then


we've got cash currency and all of them


have different rates and then we've also


got mobile


card currency it's an absolute oh


sorry it's an absolute joke


um but


at the bottom you can see


um the current inflation rate so I think


my advice to anyone worrying about


inflation don't worry about it rookie


numbers so at the moment we're at


285 percent which is we're just getting


started


um


so there's there's this great uh thing


in in Zimbabwe called corruption uh it


it works in your favor most of the time


if you can afford it


um so if if you have a look at the


police roadblock uh you can see that the


the


Barrel which is supposed to stop cars


has been hit by quite a few cars and the


the reason is is that if you hit the


barrel you could just pay the the


policeman a couple couple of dollars and


you could be on your way the other great


thing about it is the police don't have


cars I I


and yeah and we also have had fuel


shortage crisises so that's also pretty


great you can see on the bottom picture


that is a fuel queue there's probably


two pumps but about five ten ten lines


to try and get fuel and that is also


solved by paying the pump attendant and


you will be first in line so corruption


is very useful


um


ah presidents these are the two


presidents I've known my whole life uh


the one is no longer president because


he got kicked out by the other one who


was his vice president so it's a doggy


dog world but yeah two presidents I I


don't know whether it's for educational


purposes that they want us to be able to


remember our president's name so they


keep him in power longer but


I I mean it did help in the in the uh


exams and that sort of thing but yeah


two presidents my whole life and the the


Oneness dead finally he took his time


um but he's gone


uh public transport


Zimbabwean public transport is very


different to polish public transport


um and as you can see it's again it's a


joke


um this these are unfortunately


this is the situation on the ground yeah


Kate I did get the most chaotic looking


picture it's it's not always that bad


but you can't see things like that


um whereas polish public Transporters


rather delightful


ah okay so so our national dish in


Zimbabwe is called saza not to be


confused with satsa


um so yeah there's as you can see from


my search phrases we've got sudsa PL and


sudsa ZW


and they return very different images


um so yes this is our national food and


yeah please don't confuse it with Sada


um we have water in Africa well I won't


speak for the whole of Africa just for


Zimbabwe my part of Africa


um yeah we have lovely uh well we


actually have the second largest lake in


the world uh man-made lake uh Dam


actually because the lake is like


anything I don't know some technical


jargon um but yeah we do have water and


we do have wild animals and it's a great


great country


and uh we do we've got very dry places


so I was saying we have water it's in


places there are places where you where


you won't find water


um and so in the low fault the lower


lying areas it's much hotter and dry and


in the high areas it rains pretty much


the whole time so yeah we've got a mixed


bag great great destination


and uh everyone always asks me why why


are you in Poland I hope that gives you


some context and I hope you appreciate


Poland a lot more it's


thank you very much


[Applause]


okay so uh I'm gonna talk a little bit


about 3D printing so it's not related to


Ruby or Loosely related to programming


you'll see and so I bought my 3D printer


back in like 2016. it's a prusa Mark II


it was it came with in a plastic box so


you can like assemble it on your own


it's a DIY kit uh it's it's fun like to


assemble it so you can get a little bit


more understanding of how it works as


well


uh yeah so uh the United States things


about these printers is they they


provide upgrades so it's like the there


are some improvements along the way and


you can you can upgrade your printers


uh and it's also like I don't it to be


an advancement of Prussia but it they're


really reliable printers you can like if


you break something you can find a


replacement parts they're quite popular


and they have like pretty good support


Czech Republic


um okay so when it comes to like


designing stuff most people I think


that's the most popular one uh so most


people use Fusion 360 for designing


stuff so it's like proprietary uh


software works on only on Windows and


probably Mac os2


uh uh yeah so it's it's it's it's cool


it's really cool cool I used it a couple


times but um I for my purposes I think I


used mostly uh open s-cap so it's a it's


like a programming approach to to


modeling


uh you'll see in a second but and the


cool things about these uh open Ascot is


that you it's like you you write code


actually so you can store it you can


version it you can store it on GitHub


uh it's pretty cool so the code looks


like this


uh yeah so yeah now we can see the


uh an example okay so uh another thing


that you have to do after like you model


you think is like to slice it to


different layers so uh the printer works


like it just uh puts like layers on top


of each other


and for that you you can use pressure


slicer so they provide you with a uh


their own slicer you can use so it's a


pretty cool piece of software as well


um uh yeah I think it's written in


Python by the way


um Okay so


you can print like different types of


plastic different colors Etc so it's


it's it's it's really yeah that's that's


how that's what it looks like like


okay so uh funny story is like when when


my friends came and asked me to fix his


uh solar stream machine so if you've


heard about solar stream maybe you've


encountered it uh maybe you used it uh


it's a sparkling water maker and it has


like a design flow I think so it tends


to like that the button here it tends to


break at some point uh and obviously uh


you can't get it anywhere because the


manufacturer does does not provide you


with any like replacement parts


obviously you can throw it away


basically and um so yeah my friends know


that I I just like love fixing stuff so


my my friend asked me to design and


print it for him


uh


and basically it worked it looks like


this and


it's a little bit different than the


original part because of differences in


like production method but because the


original part is like injection molded


and


it's like I put it on like polish eBay


and like people starting buying it and


they just keep buying it like all over


again like I don't know I've sold like


200 uh 200 of these buttons already and


they still keep buying it so it's like a


very common issue I guess so it's like


probably there is like a uh other uh


places where you can probably like


provide some replacement parts for other


other other devices as well so if you


have any idea like if you have like


something broken maybe that there's a


way to to fix it and yeah that's it so


thank you very much


hi everyone it was quite a tough


decision to have this speech for me


because I have one friend in Road slow


which showed me


um roadstuff nightlife and yeah


um they want to speak with you regarding


one interesting feature which I as I see


is not really uh raised on some new


projects or projects that uh upgrade to


um rail 7.


um but I think it's quite interesting


this load I think in rail 7 which was


recently released


um yeah let's uh see and um


find these examples this is a really


simple example of controller index and


we have three instances to load as I


think in some applications it's a usual


situation when we need to load users


applications and invoices and just show


and render it on a view and as you can


see we have these three models and


they're pretty straightforward what's


going on here


um yeah users they have apps and


invoices and we need to show and render


it on view


and yeah how to configure this load to


sync I think we need to set up this


async query executor


um we have two options Global thread


pool and multi-thread pool the first


option is suitable when your application


uses only one database


and the second one you can use if you


have multiple databases and you can


configure this


um maximum pull size per each of these


databases in database yaml


yeah let's um focus on this example why


do we need to use this feature sometimes


it might be really helpful if we have


such situation we have this View and


this view includes these three instances


we render them users applications and


invoices and once we reach users


um


rails tries to corross it to array and


um it takes some time to execute user's


query then we convert to array then we


reach these apps and we also


make this select query it takes some


time then we have to convert it to array


and at the end we reach these invoices


and the this whole process is repeated


and yeah we make it step by step and if


we have one second per each query it


will take a general three seconds


um we can just try to change the bit and


make um


in controller try to convert to array


from the start but it doesn't really


help us because it just moves this


process of converging to array


um to a controller method but it doesn't


really help because we still need to


make it step by step load users and apps


and invoices in the end


okay and now if we you slow the thing


how it will work


we use this load the sync method and


once we have this View


and we reach users we still have to wait


once users loaded


but at this time we also simultaneously


load of these applications and invoices


and once we reach these applications on


a view and the devices there are already


loaded so if each request takes


one second


in the best case it will take as well


one second to load all of these three


instances


and I really


want to


that some people they would use this


feature and share with your experience


this is quite interesting because this


feature was released I don't know


several months ago maybe six months ago


but I didn't faced it on any projects or


I really I don't hear that people


talk regarding that and for me it will


be really interesting to


discuss this


and


probably that someone share with this


experience


okay and


this slide is quite interesting this is


uh evaluation of languages yeah and as


you can see


yeah we're looting and Ruby at the end


yeah thank you for this um thank you for


your time and please try out this


feature and share with your experience


all right so now the last part so I'm


not really giving a lightning talk I'm


just we have five ebooks to give away


from pragmatic programmers so you can


yeah give a clap for uh for the


programmatic programmers


[Applause]


um yeah so as usual we are doing this


like random out of the all lightning


talks I hope that any of you who give


who gave lightning talk can see yourself


on the list


uh you can mobile program my uh or code


review my my script


right it's visible I think so yeah


all right and this is these are the


winners


[Applause]