ruby console commands cheat sheet code example

Example 1: ruby cheat sheet

Four good ruby cheat Sheets:
https://overapi.com/ruby
http://www.testingeducation.org/conference/wtst3_pettichord9.pdf
https://github.com/ThibaultJanBeyer/cheatsheets/blob/master/Ruby-Cheatsheet.md#basics
https://www.vikingcodeschool.com/professional-development-with-ruby/ruby-cheat-sheet

Example 2: best ruby cheat sheet

"Hello".length # 5
"Hello".reverse # “olleH”
"Hello".upcase # “HELLO”
"Hello".downcase # “hello”
"hello".capitalize # “Hello”
"Hello".include? "i" # equals to false because there is no i in Hello
"Hello".gsub!(/e/, "o") # Hollo
"1".to_i # transform string to integer –– 1
"test".to_sym # converts to :test
"test".intern # :test
:test.to_s # converts to "test"