Andrew Dzhoha djo

Project

Some description how is awesome the project.

See the current amount of free and used memory in the system:

free -m

What actual time we have (in the console):

time = Benchmark.measure do
  app.get '/needed-page'
end

puts time

Keep in mind that not all gems (versions) support a needed ruby version.

Try 'bundle install'.

	current_date=`date +%Y-%m-%d-%H:%M`
	file_name="db.$current_date.sql.gz"
	file_path="/mnt/backup/$file_name"
	mysqldump --single-transaction --quick -u* -p* DB \| gzip -c > $file_name
	echo `ls -la $file_path` \| mail -s "[backup] DB" [email protected]

	# Returns a number rounded to the desired multiple 0.5,
	# analog of excel's MROUND(A1, 0.05).
	def mround(number)
	(number * 20).round.to_f / 20
	end

	# Test script to profile requests with GC options in case you have only access into the console.
	#
	# Invoke the script in the staging/production console:
	#
	# RAILS_ENV=production rails console
	# [1] pry(main)> load '/path/to/the-file/requests.rb'
	#
	# You will see benchmark results per link for analyzing.
	#
	# You should run it before and after changing GC options for comparison.

	# Problem 1 of 3: Math
	# ====================
	#
	# n! means n * (n - 1) * ... * 3 * 2 * 1
	# For example, 10! = 10 * 9 * ... * 3 * 2 * 1 = 3628800
	# Let R(n) equal the sum of the digits in the number n!
	# For example, R(10) is 3 + 6 + 2 + 8 + 8 + 0 + 0 = 27.
	# Find the lowest value for n where R(n) is 8001.
	#
	# Result: 787.

	# Example for http://rungist.com/

	about = ".xobdnas ybur eht ni tsig s'buhtig a nur ot uoy swolla tI .ybuR yrT rehtonA teY eht si sihT"
	"Hi, #{about.reverse}"

	# Monitor some background process on execution
	watch -n 1 "ps aux \| grep php"

	# Change mass-assignment protection strategy to black-list to allow updates of virtual attributes
	Delayed::Job.attr_protected nil