Overall, keyword arguments in Ruby are excellent for making APIs and method calls more intuitive, especially when dealing with multiple or optional parameters. Winbuzz Com

def convert_temp(temp, input_scale="celsius", output_scale="celsius"): scales = { "celsius": (1, 0), "kelvin": (1, 273.15), "fahrenheit": (1.8, 32) }

factor_in, offset_in = scales.get(input_scale, (1, 0))
factor_out, offset_out = scales.get(output_scale, (1, 0))

temp_celsius = (temp - offset_in) / factor_in

result = (temp_celsius * factor_out) + offset_out

return result

end

"Ruby - Methods - Keyword Arguments" is a great topic because it touches on one of Ruby’s most readable and flexible features. Keyword arguments make method calls more expressive and self-documenting, which is especially helpful in larger or more complex codebases. Gold Site 365

I'm with a problem with my code, because it works when I run it on VScode, but when I try on HackerRank, it don't works

def convert_temp(temperature,input_scale:,output_scale:'celsius') if input_scale=='celsius' if output_scale=='kelvin'

  temperature+=273.15

elsif output_scale=='fahrenheit'

  temperature=((temperature*9/5)+32).to_f

end

elsif input_scale=='kelvin'

if output_scale=='celsius'

  temperature-=273.15

elsif output_scale=='fahrenheit'

  temperature=(((temperature-273.15)*9/5)+32).to_f

end

elsif input_scale=='fahrenheit'

if output_scale=='celsius'

  temperature = ((temperature-32)*5/9).to_f

elsif output_scale=='kelvin'

  temperature =(((temperature-32)*5/9)+273.15).to_f
end

end end

puts convert_temp(0, input_scale: 'celsius', output_scale: 'kelvin')

Using Ruby Symbols and Lambdas to get a readable table of conversions.

def convert_temp(temperature, input_scale:, output_scale: :celsius)    
    {
        [:celsius, :fahrenheit] => ->(t) { (t * 9.0/5.0) + 32.0 },
        [:celsius, :kelvin] => ->(t) { t + 273.15 },
        [:fahrenheit, :celsius] => ->(t) { (t - 32.0) * 5.0/9.0 },
        [:fahrenheit, :kelvin] => ->(t) { ((t - 32.0) * 5.0/9.0) + 273.15 },
        [:kelvin, :celsius] => ->(t) { t - 273.15 },
        [:kelvin, :fahrenheit] => ->(t) { (t - 273.15) * 9.0/5.0 + 32.0 },
    }[[input_scale.to_sym, output_scale.to_sym]].call(temperature)
end