DISTANCE OF point to rectangle (without case logic)

A great solution by MultiRRomero:

function distance(Rectange r, Point p) {
  dx = max(r.x_min-p.x, 0, p.x-r.x_max);
  dy = max(r.y_min-p.y, 0, p.y-r.y_max);

  return sqrt(dx*dx + dy*dy);
}

References:

• https://stackoverflow.com/questions/5254838/calculating-distance-between-a-point-and-a-rectangular-box-nearest-point

Laravel Naming conventions

What	How	Should Follow	Not to Use
Controller	singular	PostController	PostsController
Route	plural	posts/1	post/1
Named route	snake_case with dot notation	users.show_active	users.show-active, show-active-users
Model	singular	User	Users
hasOne or belongsTo relationship	singular	postComment	postComments, post_comment
All other relationships	plural	postComments	postComment, post_comments
Table	plural	post_comments	post_comment, postComments
Pivot table	singular model names in alphabetical order	post_user	user_post, posts_users
Model property	snake_case	$model->created_at	$model->createdAt
Foreign key	singular model name with _id suffix	post_id	PostId, id_post, posts_id
Primary key	–	id	custom_id
Migration	–	date_create_posts_table	2019_05_08_posts
Method	camelCase	getAll	get_all
Method in resource controller	table	store	savePost
Variable	camelCase	$postsWithAuthor	$posts_with_creator

Docker

Reference

Command	description
systemctl start docker systemctl status docker systemctl stop docker docker info docker version	start docker view docker process status stop docker view docker info view docker version
docker images docker image ls docker search ubuntu docker pull ubuntu docker rmi ubuntu docker image rm	view image list view image list ( > v1.13) search for an image download an image delete an image delete an image ( > v1.13)
docker ps -a docker ps -l docker container ls docker container rm <cid> docker rm <cid>	view running containers view all containers view containers ( > v1.13) delete container with id <cid> delete container with id <cid>
docker run imagename docker run –name bla imagename docker run -it ubuntu docker start <cid> docker stop <cid> docker stop $(docker ps -q) docker stats <cid> docket top <cid> docker kill<cid>	create and run a container create and run a named container create interactive session start an existing container stop a container stop all running containers view running stats of a container view top stats of a container kill a running container
docker attach <cid> docker exec -it ubuntu bash	reconnect to a running container Open a new terminal window

How to detach

How container was started	how to detach
-t and -i is used to launch the container	ctrl + P and then ctrl + Q
-t is used to launch the container	ctrl + C
otherwise	pkiill

Examples

sudo docker run --detach \
  --hostname gitlab.example.com \
  --publish 443:443 --publish 80:80 --publish 22:22 \
  --name gitlab \
  --restart always \
  --volume /srv/gitlab/config:/etc/gitlab \
  --volume /srv/gitlab/logs:/var/log/gitlab \
  --volume /srv/gitlab/data:/var/opt/gitlab \
  gitlab/gitlab-ce:latest

References:

• https://www.tecmint.com/install-docker-and-learn-containers-in-centos-rhel-7-6/

Free and public dns servers (2019)

Provider	Primary DNS	Secondary DNS
CenturyLink (Level3)	209.244.0.3	209.244.0.4
Verisign	64.6.64.6	64.6.65.6
Google	8.8.8.8	8.8.4.4
Quad9	9.9.9.9	149.112.112.112
DNS.WATCH	84.200.69.80	84.200.70.40
Comodo Secure DNS	8.26.56.26	8.20.247.20
OpenDNS Home	208.67.222.222	208.67.220.220
GreenTeamDNS	81.218.119.11	209.88.198.133
SafeDNS	195.46.39.39	195.46.39.40
OpenNIC	198.206.14.241	172.98.193.42
SmartViper	208.76.50.50	208.76.51.51
Dyn	216.146.35.35	216.146.36.36
FreeDNS	45.33.97.5	37.235.1.177
Alternate DNS*	198.101.242.72	23.253.163.53
Yandex.DNS	77.88.8.8	77.88.8.1
UncensoredDNS	91.239.100.100	89.233.43.71
Hurricane Electric	74.82.42.42
puntCAT	109.69.8.51
Neustar	156.154.70.1	156.154.71.1
Cloudflare	1.1.1.1	1.0.0.1
Fourth Estate	45.77.165.194
CleanBrowsing	185.228.168.9	185.228.169.9

* Automatic ad blocking

enable cors (standard ee)

Simply create the filter:

import java.io.IOException;
 import javax.ws.rs.container.ContainerRequestContext;
 import javax.ws.rs.container.ContainerResponseContext;
 import javax.ws.rs.container.ContainerResponseFilter;
 import javax.ws.rs.ext.Provider;
 @Provider
 public class RestResponseFilter implements ContainerResponseFilter{
 @Override
     public void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext) throws IOException{
         responseContext.getHeaders().putSingle("Access-Control-Allow-Origin", "*");
         responseContext.getHeaders().putSingle("Access-Control-Allow-Credentials", "true");
         responseContext.getHeaders().putSingle("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT");
         responseContext.getHeaders().putSingle("Access-Control-Allow-Headers", "Content-Type, Accept");
     }
 }

References

• https://stackoverflow.com/questions/10343892/glassfish-how-to-set-access-control-allow-origin-header

CREATE A USER IN MYSQL

Create a user in MySQL with full rights:

CREATE USER ‘qweqwe’@’localhost’ IDENTIFIED BY ‘qweqwe’;
GRANT ALL PRIVILEGES ON * . * TO ‘qweqwe’@’localhost’;

max number of watches

You can increase the max number of watches with the following commands:

• sudo gedit /proc/sys/fs/inotify/max_user_watches
  • add the line: fs.inotify.max_user_watches=524288
• sudo sysctl -p

Reload component when same route is requested

The simplest solution is to add a :key attribute to :

<router-view :key="$route.fullPath"></router-view>

See:

https://laracasts.com/discuss/channels/vue/vue-2-reload-component-when-same-route-is-requested

Mind fitness links

• https://waitbutwhy.com
• https://brilliant.org

Monolog log levels

use Illuminate\Support\Facades\Log;


Log::emergency($message);
Log::alert($message);
Log::critical($message);
Log::error($message);
Log::warning($message);
Log::notice($message);
Log::info($message);
Log::debug($message);