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Start your free trialThomas Salai
4,964 PointsWhy do we check number in as a String ?
Why do we check here if kind == as a String in double quote! ? Do we check here answer(which is from uswer input) is Numeric Type or NOT ?
def ask(question,kind="string")
print question + " "
answer = gets.chomp
answer = answer.to_i if kind == "number"
return answer
end
answer = ask("What is your name?")
puts answer
answer = answer.to_i if kind == "number"
this line and
answer = answer.to_i if kind == "number"
this line are same ?
answer = answer.to_i if answer.is_a?(Numeric)
this comparison with String value "number" make me confusions. Can anybody explain me here why we do this and how Ruby interpret the comparison == "number".
many thanks in advance.
Thomas
2 Answers
ellie adam
26,377 Pointshi there, It is always a question why we check number in as a String ?
For example when i am checking numeric or not am expecting as below results
"34" => true
34 => true
"34sdfds" => it should return false
34.90 => false
"34.90" => false
This is very helpful article; http://mentalized.net/journal/2011/04/14/ruby-how-to-check-if-a-string-is-numeric/
happy coding :)
rowend rowend
2,926 PointsWell, let me say this: The ask method get 2 arguments. The first argument question is not optional. The second argument kind is optional and have a default value 'string'. This means you can call your method like:
ask('what is your name?') in this case the method will no do the integer conversion.
ask('waht is your age?', 'number') in this case the method will do the integer conversion.
I hope this help you.