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https://github.com/ythecombinator/safadometro

👼Polyglot implementations of "safadeza" calculus.
https://github.com/ythecombinator/safadometro

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👼Polyglot implementations of "safadeza" calculus.

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README 

        
# safadômetro



> Polyglot implementations of *"safadeza"* calculus.



![Aquele 1%](cover.png)



## Table of Contents



- [The Problem](#the-problem)

- [Motivation](#motivation)

- [Contributing](#contributing)

- [Status](#status)

- [Importance](#importance)

- [License](#license)



## The Problem



Sometimes, you want to know how **safad(o/a)** - a Brazilian Portuguese word for

*naughty* - someone is. A very popular Brazilian musician desbribes himself as

being `99%` an angelical and perfect person; but the other `1%` is naughty - as

you can see [in the lyrics](http://www.vagalume.com.br/marcos-e-belutti/aquele-um-por-cento-part-wesley-safadao.html).



A very clever professor from a state university in Brazil proposed a way o calculing

how *safado* some is based on his/her date of birth.



The *magical formula* needs:



- A `sum` function which takes an `int` a returns the sum of it with all its

previous positive integers, e.g. `sum(5) = 5 + 4 + 3 + 2 + 1`.



- A `safadeza` function which is given by:



  `safadeza = sum(month) + (year / 100) * (50 - day)`



- An `angel` function which is given by:



  `angel = 100 - safadeza`



_The last two functions **MUST** return a float_



So this repo is for writing code that shows others how *safado* they are.



I look forward to seeing what you come up with c:



## Motivation



![Where everything started.](question.jpg)



> The programming question which quotes Wesley Safadão and turned to be a hit

on the web.



It all started when a professor from the Quixadá campus of the Federal University

of Ceará - *Universidade Federal do Ceará (UFC)* - Jefferson de Carvalho called

everyone's attention by using a hit of the *sertanejo* and *forró music* to teach

imperative programming logic to his students.



He was inspired by the song *[Aquele 1%](http://www.vagalume.com.br/marcos-e-belutti/aquele-um-por-cento-part-wesley-safadao.html)*,

which is a success from the duo Marcos & Belutti featuring a very popular

Brazilian musician, Wesley Safadão, to write his logical challenge.



> If you'd like to find out more content about this funny story, [there are](http://g1.globo.com/ceara/noticia/2015/12/professor-cita-wesley-safadao-em-questao-de-logica-e-vira-hit-na-web.html)

[lots](http://revistagalileu.globo.com/blogs/buzz/noticia/2015/12/professor-universitario-usa-wesley-safadao-em-prova-de-programacao.html)

[of](http://gazetaonline.globo.com/_conteudo/2015/12/entretenimento/cultura_e_famosos/3917154-professor-cita-wesley-safadao-e-questao-de-logica-e-bomba-na-web.html)

[good resources](http://www.opovo.com.br/app/divirta-se/2015/12/04/noticiasdivirtase,3544424/professor-da-ufc-elabora-questao-de-prova-fazendo-referencia-a-wesley.shtml)

[on the web](http://www.ibahia.com/detalhe/noticia/professor-cita-wesley-safadao-em-questao-de-prova-e-faz-sucesso/?cHash=74e1cc909aa2269eb81a4401b282d892)

[about it](http://maisregiao.com.br/professor-cita-wesley-safadao-em-questao-de-prova-e-faz-sucesso/).



## Contributing



### Basic Requirements



- You **MUST** be listening to the [music](http://www.vagalume.com.br/marcos-e-belutti/aquele-um-por-cento-part-wesley-safadao.html) while coding.

- If you have to stop listening, close the editor - your time is over!

- Please, don' use tabs. Tabs are from Satan. Use spaces. - actually,

just follow the basic [styleguide](.editorconfig).



### Adding a New Implementation



1. Just think of your own interpretation of the problem.

1. Check if anyone has suggested this before [here](https://github.com/mabrasil/safadometro/pulls).

1. Fork this project!

1. Create a new folder with the name of the language you've used in your solution, e.g. `javascript/`.

1. If the language you want to implement already has an implemention, make `version-*` in the folder!

1. **Put the implementation and the example in separated files**.

1. Tick the language - with `- [x]` in *GitHub Flavored Markdown* - in which

you've implemented [here](STATUS.md).

1. Commit your changes: `git commit -m 'Add JavaScript version'`.

1. Push to the branch: `git push origin master`.

1. Submit a pull request :)



> If you'd like to contribute with a language in which the algorithm has already

been implemented - but you have a *new/special/different/whatever* way of making -,

you can make it! Just create a new folder inside the folder of the language, e.g.

`javascript/browser`, `javascript/node`, `javascript/react` etc.



### Adding a New Language



1. Check if anyone has suggested this before [here](https://github.com/mabrasil/safadometro/pulls).

1. Fork this project!

1. Add the language to the [languages tracking file](STATUS.md) - **don't forget to obey alphabetical order**.

1. Commit your changes: `git commit -m 'Add JavaScript to listed languages'`.

1. Push to the branch: `git push origin master`.

1. Submit a pull request :)



## Status



You can check a list of languages in which the problem's been implemented - or

should've been - [here](STATUS.md).



## Importance



This project may seem useless, but, amazingly, **it is not**.



In about two days it achieved something interesting: a deterministic algorithm said

to be *simple* which when implemented in [40+ languages](STATUS.md), tells us a lot!

E.g.



- It shows us a different *programming logic* from the imperative one we are

probably used to think, such as declarative.



- It allows us to think in different paradigms from the ones we are probably used

to think, e.g. functional and logical ones.



- It allows us to study and analyze *new implementations* in *new langs*, for example:

a taste of [Smalltalk](https://github.com/mabrasil/safadometro/blob/master/smalltalk/WesleySafadao.st)'s pure Object

Orientation - *hooray for Allan Kay, Adele Goldberg et al!* - or a bit of

functional programming in [Haskell](https://github.com/mabrasil/safadometro/blob/master/haskell/WesleySafadao.hs) - and

its beautiful *type system, monads etc.* - or the different *logic* that a

language based on Horn Clauses such as [Prolog](https://github.com/mabrasil/safadometro/blob/master/prolog/WesleySafadao.pl) reveals.



- Or, amazingly, the underground languages that we don't know - after all, getting to

know a [DSL written in JS, which has a different approach to prototype-based OO](https://github.com/mabrasil/safadometro/blob/master/siren/Safadão.siren)

or a [declarative DSL written in TypeScript and LiveScript which has a type system inspired by Idris and aims printers](https://github.com/mabrasil/safadometro/blob/master/capybara/WesleySafadao.capy) is not something you do every day.



So the lesson is: **that kind of initiative shows us that in modern times not only

with *FizzBuzz-alike* implementations you can learn programming logic/languages/

paradigms**.



## License



[safadômetro](https://github.com/mabrasil/safadometro) is distributed under the

MIT License, available in this repository. All contributions are assumed to be also licensed under

the MIT License.



> Wesley Oliveira da Silva, also known as *Wesley Safadão*, is a Brazilian singer, songwriter, producer, and businessman. The *safadômetro* project does not have any rights over anything related to the him; images, logos, and everything related to the him have All Rights Reserved to *Wesley Safadão & Banda Garota Safada*.