Splat arguments & Blocks

# Splat arguments - can receive more than 1 arguments

def what_up(greeting, *friends)
  friends.each { |friend| puts "#{greeting}, #{friend}!" }
end

what_up("What up", "Ian", "Zoe", "Zenas", "Eleanor")

# Blocks can be defined with either the keywords do and end or with curly braces ({}).
1.times do
  puts "I'm a code block!"
end

1.times { puts "As am I!" }

=begin
However, the block that we define (following .each) will only be called once, and in the context of the array that we are iterating over.
Hence it's better to use method than blocks if there is a need of reuse.
=end

# method that capitalizes a word
def capitalize(string)
  puts "#{string[0].upcase}#{string[1..-1]}"
end

capitalize("ryan") # prints "Ryan"
capitalize("jane") # prints "Jane"

# block that capitalizes each string in the array
["ryan", "jane"].each {|string| puts "#{string[0].upcase}#{string[1..-1]}"} # prints "Ryan", then "Jane"