Ruby Cheat Sheet

Upper/lower case version of a string

"test".downcase
"test".upcase

Check if a string contains another string

my_string.include? "target"

Replace in string

stringVar.gsub("replacewhat","withthis") # add ! to replace in-place

Length of array

arrVar.length

Try/Catch exception handling

begin
   error_code_here()
rescue
   handle_error()
end

Ternary/conditional operator:

result = condition ? if_true : if_false