if.js

var obj = {
  if: function (condition, trueStatement, falseStatement) {
    if (condition) return trueStatement;
    return falseStatment;
  },
  in: function () {
    console.log('This is an `in` method');
  },
  arguments: function () {
    console.log('This is an `arguments` method');
  },
  int: function () {
    console.log('This is an `int` method');
  }
};

obj.if(true, true, false);
obj.arguments();
obj.in();
obj.int();

if.py

# Thid doesn't work... 
# class SampleClass():

#     def if(self, condition, true_statement, false_statement):
#         if (condition) return true_statement
#         return false_statement

# sample = SampleClass()
# print sample.if(True, True, False)

class SampleClass():

    def __init__(self):
        self.data = {}
        self['if'] = self.create_if_function()

    def create_if_function(self):
        def function(self, condition, true_statement, false_statement):
            if (condition) return true_statement
            return false_statement
        return function

    def __setitem__(self, key, item):
        self.data[key] = item

    def __getitem__(self, key):
        return self.data[key]

sample = SampleClass()
sample['if']()

if.rb

class SampleClass
  def if(condition, true_statement, false_statement)
    if condition
      return true_statement
    false_statement
  end
end

sample = SampleClass.new()
puts sample.if(true, true, false)