What is the difference between blocks and methods in Ruby?
In Ruby, methods are defined with the def
keyword and can be called with arguments. Blocks are chunks of code that can be passed to methods, usually enclosed in do...end
or curly braces.
Can you give me an example of a block being used in a method?
Sure! Here's an example:
def greet(name, &block)
puts "Hello, #{name}!"
block.call if block_given?
end
greet('Alice') { puts 'Welcome to Ruby!'}
What are some advantages of using blocks over methods?
Blocks allow for more flexible code execution and can be used for callbacks, making your code more modular and reusable.
Are there any limitations to using blocks?
Yes, blocks cannot be called independently like methods; they must be passed to a method. Also, they can only take one argument.
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