length – How long the string is
print('Find String Length'.length) # 18
strip – Removes leading and trailing white space
print(' I am the String with space '.strip) # I am the String with space
to_i – Changes a string into a number
print("123".to_i ) # 123
upcase, downcase – Changes the case of the string
print('woohoo Ruby '.upcase ) # WOOHOO RUBY print('WOOHOO RUBY '.downcase ) # woohoo ruby
each_char – Loops through the string returning each character
"ABC".each_char do |val| p val end # "A" # "B" # "C"
include? – Returns true if a string is in another string
print('Hello world'.include? 'World') # false print('Im the New One'.downcase.include? 'one') # true
gsub – Substitutes a new string where a pattern is found
print('Hello Washington, my name is Washington'.gsub 'Washington', 'Louisiana') # Hello Louisiana, my name is Louisiana