Andrey Morskov accessd

This list is based on aliases_spec.rb.

You can see also Module: RSpec::Matchers API.

matcher	aliased to	description
a_truthy_value	be_truthy	a truthy value
a_falsey_value	be_falsey	a falsey value
be_falsy	be_falsey	be falsy
a_falsy_value	be_falsey	a falsy value

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

Pry Cheat Sheet

Youtube Tutorial 2013

Command Line

pry -r ./config/app_init_file.rb - load your app into a pry session (look at the file loaded by config.ru)
pry -r ./config/environment.rb - load your rails into a pry session

Debugger

Default

Powerlevel10k

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

	apiVersion: v1
	kind: ConfigMap
	metadata:
	name: example
	namespace: default
	data:
	APPLICATION_HOST: example.com
	LANG: en_US.UTF-8
	PIDFILE: /tmp/server.pid
	PORT: "3000"

	# The following comments fill some of the gaps in Solargraph's understanding of
	# Rails apps. Since they're all in YARD, they get mapped in Solargraph but
	# ignored at runtime.
	#
	# You can put this file anywhere in the project, as long as it gets included in
	# the workspace maps. It's recommended that you keep it in a standalone file
	# instead of pasting it into an existing one.
	#
	# @!parse
	# class ActionController::Base

	http://stackoverflow.com/questions/22667401/postgres-json-data-type-rails-query
	http://stackoverflow.com/questions/40702813/query-on-postgres-json-array-field-in-rails

	#payload: [{"kind"=>"person"}]
	Segment.where("payload @> ?", [{kind: "person"}].to_json)

	#data: {"interest"=>["music", "movies", "programming"]}
	Segment.where("data @> ?", {"interest": ["music", "movies", "programming"]}.to_json)
	Segment.where("data #>> '{interest, 1}' = 'movies' ")
	Segment.where("jsonb_array_length(data->'interest') > 1")

	# Convert the .cer file into a .pem file:
	$ openssl x509 -in aps_development.cer -inform der -out PushChatCert.pem

	# Convert the private key’s .p12 file into a .pem file:
	$ openssl pkcs12 -nocerts -in PushChatKey.p12 -out PushChatKey.pem

	# Finally, combine the certificate and key into a single .pem file
	$ cat PushChatCert.pem PushChatKey.pem > ck.pem

	# At this point it’s a good idea to test whether the certificate works.

	git branch -m old_branch new_branch # Rename branch locally
	git push origin :old_branch # Delete the old branch
	git push --set-upstream origin new_branch # Push the new branch, set local branch to track the new remote