How do I call a function in Ruby?

I'm trying to call but I keep getting an error. This is my code:

require 'rubygems'
require 'net/http'
require 'uri'
require 'json'

class AlchemyAPI

  #Setup the endpoints
  @@ENDPOINTS = {}
  @@ENDPOINTS['taxonomy'] = {}
  @@ENDPOINTS['taxonomy']['url']  = '/url/URLGetRankedTaxonomy'
  @@ENDPOINTS['taxonomy']['text'] = '/text/TextGetRankedTaxonomy'
  @@ENDPOINTS['taxonomy']['html'] = '/html/HTMLGetRankedTaxonomy'

  @@BASE_URL = 'http://access.alchemyapi.com/calls'

  def initialize()

    begin
        key = File.read('C:\Users\KVadher\Desktop\api_key.txt')
        key.strip!

        if key.empty?
            #The key file should't be blank
            puts 'The api_key.txt file appears to be blank, please copy/paste your API key in the file: api_key.txt'
            puts 'If you do not have an API Key from AlchemyAPI please register for one at: http://www.alchemyapi.com/api/register.html'            
            Process.exit(1)
        end

        if key.length != 40
            #Keys should be exactly 40 characters long
            puts 'It appears that the key in api_key.txt is invalid. Please make sure the file only includes the API key, and it is the correct one.'
            Process.exit(1)
        end

        @apiKey = key
    rescue => err
        #The file doesn't exist, so show the message and create the file.
        puts 'API Key not found! Please copy/paste your API key into the file: api_key.txt'
        puts 'If you do not have an API Key from AlchemyAPI please register for one at: http://www.alchemyapi.com/api/register.html'

        #create a blank file to hold the key
        File.open("api_key.txt", "w") {}
        Process.exit(1)
    end
  end

  # Categorizes the text for a URL, text or HTML.
  # For an overview, please refer to: http://www.alchemyapi.com/products/features/text-categorization/
  # For the docs, please refer to: http://www.alchemyapi.com/api/taxonomy/
  # 
  # INPUT:
  # flavor -> which version of the call, i.e.  url, text or html.
  # data -> the data to analyze, either the the url, text or html code.
  # options -> various parameters that can be used to adjust how the API works, see below for more info on the available options.
  #
  # Available Options:
  # showSourceText -> 0: disabled (default), 1: enabled.
  #
  # OUTPUT:
  # The response, already converted from JSON to a Ruby object. 
  #
  def taxonomy(flavor, data, options = {})


    unless @@ENDPOINTS['taxonomy'].key?(flavor)
        return { 'status'=>'ERROR', 'statusInfo'=>'Taxonomy info for ' + flavor + ' not available' }

    end

    #Add the URL encoded data to the options and analyze
    options[flavor] = data
    return analyze(@@ENDPOINTS['taxonomy'][flavor], options)
    print

  end

  **taxonomy(text,"trees",1)**

end

In ** ** I have entered my call. Am I doing something incorrect. The error I receive is:

C:/Users/KVadher/Desktop/testrub:139:in `<class:AlchemyAPI>': undefined local variable or method `text' for AlchemyAPI:Class (NameError)
    from C:/Users/KVadher/Desktop/testrub:6:in `<main>'

I feel as though I'm calling as normal and that there is something wrong with the api code itself? Although I may be wrong.

Solution

Yes, as jon snow says, the function (method) call must be outside of the class. The methods are defined along with the class.

Also, Options should be a Hash, not a number, as you call options[flavor] = data, which is going to cause you another problem.

I believe maybe you meant to put text in quotes, as that is one of your flavors.

Furthermore, because you declared a class, this is called an instance method, and you must make an instance of the class to use this:

my_instance = AlchemyAPI.new
my_taxonomy = my_instance.taxonomy("text", "trees")

That's enough to get it to work, it seems like you have a ways to go to get this all working though. Good luck!