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Piotr Kapera rn0

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rn0 / Xvfb.service
Created Oct 16, 2019 — forked from ypandit/Xvfb.service
Xvfb as a systemd service
View Xvfb.service
Description=X Virtual Frame Buffer Service
ExecStart=/usr/bin/Xvfb :99 -screen 0 1024x768x24
rn0 / array-validation-error-mapping.php
Created Jun 8, 2017 — forked from webmozart/array-validation-error-mapping.php
A little experiment: Validating (potentially multi-leveled) arrays with the Symfony2 Validator component and returning the errors in the same data structure as the validated array by using the Symfony2 PropertyAccess component.
View array-validation-error-mapping.php
use Symfony\Component\PropertyAccess\PropertyAccess;
use Symfony\Component\Validator\Constraints\All;
use Symfony\Component\Validator\Constraints\Choice;
use Symfony\Component\Validator\Constraints\Collection;
use Symfony\Component\Validator\Constraints\Length;
use Symfony\Component\Validator\Constraints\NotBlank;
use Symfony\Component\Validator\Constraints\Optional;
use Symfony\Component\Validator\Constraints\Required;
View DiscriminatorListener.php
namespace My\Namespace;
* This Listener listens to the loadClassMetadata event. Upon this event
* it hooks into Doctrine to update discriminator maps. Adding entries
* to the discriminator map at parent level is just not nice. We turn this
* around with this mechanism. In the subclass you will be able to give an
* entry for the discriminator map. In this listener we will retrieve the
* load metadata event to update the parent with a good discriminator map,
rn0 /
Last active Aug 29, 2015 — forked from piscisaureus/

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url =

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

View tmux-cheatsheet.markdown

tmux shortcuts & cheatsheet

start new:


start new with session name:

tmux new -s myname
View EntityHiddenType.php
namespace Dpn\ToolsBundle\Form\Type;
use Symfony\Component\Form\AbstractType;
use Dpn\ToolsBundle\Form\DataTransformer\EntityToIdTransformer;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
use Doctrine\Common\Persistence\ObjectManager;
View ExampleType.php
// src/Acme/DemoBundle/Form/ExampleType.php
namespace Acme\DemoBundle\Form;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Acme\DemoBundle\Form\Type\FieldsetType;
class ExampleType extends AbstractType {

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

So you're curious in learning this new thing called (Functional) Reactive Programming (FRP).

Learning it is hard, even harder by the lack of good material. When I started, I tried looking for tutorials. I found only a handful of practical guides, but they just scratched the surface and never tackled the challenge of building the whole architecture around it. Library documentations often don't help when you're trying to understand some function. I mean, honestly, look at this:

Rx.Observable.prototype.flatMapLatest(selector, [thisArg])

Projects each element of an observable sequence into a new sequence of observable sequences by incorporating the element's index and then transforms an observable sequence of observable sequences into an observable sequence producing values only from the most recent observable sequence.

View _media-queries.scss
// Media Queries in Sass 3.2
// These mixins make media queries a breeze with Sass.
// The media queries from mobile up until desktop all
// trigger at different points along the way
// And important point to remember is that and width
// over the portrait width is considered to be part of the
// landscape width. This allows us to capture widths of devices
// that might not fit the dimensions exactly. This means the break
View AccountType.php
namespace NoxLogic\DemoBundle\Form\Type;
use Doctrine\ORM\EntityManager;
use NoxLogic\DemoBundle\Entity\Province;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormEvents;