CODEWITHSUNDEEP
ruby
Lilp
Lilp

Reputation: 971

Examples of methods with single string arguments

Could someone give me an example of a method that accepts a single string argument. Whilst i appreciate this might seem trivial I am trying to understand how this works in ruby. Would the syntax below be correct.

Def method("argument")
  true
end

Upvotes: 0

Views: 2687

Answers (3)

Amit Joki
Amit Joki

Reputation: 59262

You need to check if it is a string by yourself. You can make use of is_a? to see if it is a String as Ruby is dynamically typed.

def add_watson(f_name)
  f_name << " Watson" if f_name.is_a? String
end

Now, calling it

puts add_watson("Emma") #=> Emma Watson

Upvotes: 1

Amrit Dhungana
Amrit Dhungana

Reputation: 4485

Your syntax is wrong.

def method(arg)
   puts "arg"
end

You can review some tutorial too

http://www.tutorialspoint.com/ruby/ruby_methods.htm

http://www.skorks.com/2009/08/method-arguments-in-ruby/

Upvotes: -1

Marek Lipka
Marek Lipka

Reputation: 51171

No, it wouldn't. First of all, def keyword is lowercased. Also, method argument(s) is written like this def my_method(argument) and at this point it doesn't check if it's string, in fact, it can accept any object, because Ruby is typed dynamically. If you want to force String instance as an argument, you can do it inside of method body:

def my_method(argument)
  raise ArgumentError, "argument must be a String" unless argument.is_a? String
  true
end

Upvotes: 1

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