Blocks, Procs & Lambda

Ahmad hamza

What is a block?

Blocks are like nameless methods

1.times do
  puts "Hello CyRuG!"
end


1.times { puts "CyRu is Cybage Ruby Users Group" }

def capitalize(string) 
  puts "#{string[0].upcase}#{string[1..-1]}"
end

capitalize("salil") # prints "Salil"
capitalize("nilesh") # prints "Nilesh"

The capitalize method capitalizes a word, and we can continually invoke the capitalize method by name.

["prajakta", "trupti"].each {|string| puts "#{string[0].upcase}#{string[1..-1]}"}

# prints "Prajakta", then "Trupti"

The block that we define will only be called once and in the context of the array that we are iterating over.