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R74's solution

to Bob in the Lua Track

Published at Jun 29 2019 · 0 comments
Test suite


This exercise has changed since this solution was written.

Bob is a lackadaisical teenager. In conversation, his responses are very limited.

Bob answers 'Sure.' if you ask him a question.

He answers 'Whoa, chill out!' if you yell at him.

He answers 'Calm down, I know what I'm doing!' if you yell a question at him.

He says 'Fine. Be that way!' if you address him without actually saying anything.

He answers 'Whatever.' to anything else.

Bob's conversational partner is a purist when it comes to written communication and always follows normal rules regarding sentence punctuation in English.

Running the tests

To run the tests, run the command busted from within the exercise directory.

Further information

For more detailed information about the Lua track, including how to get help if you're having trouble, please visit the exercism.io Lua language page.


Inspired by the 'Deaf Grandma' exercise in Chris Pine's Learn to Program tutorial. http://pine.fm/LearnToProgram/?Chapter=06

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.


local bob = require('bob')

describe('bob', function()
  it('stating something', function()
    local result = bob.hey('Tom-ay-to, tom-aaaah-to.')
    assert.are.equals('Whatever', result)

  it('shouting', function ()
    local result = bob.hey('WATCH OUT!')
    assert.are.equals('Whoa, chill out!', result)

  it('asking a question', function ()
    local result = bob.hey('Does this cryogenic chamber make me look fat?')
    assert.are.equals('Sure', result)

  it('talking forcefully', function ()
    local result = bob.hey("Let's go make out behind the gym!")
    assert.are.equals('Whatever', result)

  it('shouting numbers', function ()
    local result = bob.hey('1, 2, 3 GO!')
    assert.are.equals('Whoa, chill out!', result)

  it('shouting with special characters', function ()
    local result = bob.hey('ZOMG THE %^*@#$(*^ ZOMBIES ARE COMING!!11!!1!')
    assert.are.equals('Whoa, chill out!', result)

  it('silence', function ()
    local result = bob.hey('')
    assert.are.equals('Fine, be that way.', result)
function bob(s)
  local nothing, question, yell, result

  if #s == 0 then
    nothing = true

  if s:find("%?$") then
    question = true

  for w in s:gmatch("(%a+)") do
    if w == w:upper() then
      yell = true

  if question and yell then
    result = "Calm down, I know what I'm doing!"
  elseif question then
    result = "Sure."
  elseif yell then
    result = "Whoa, chill out!"
  elseif nothing then
    result = "Fine. Be that way!"
    result = "Whatever."

  return result

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