Conditionals

Default Values

Consider ternary operator 'or' instead of nil checks to improve readability.

BAD

if name then
    return name
else
    return "John Doe"
end

GOOD

return name or "John Doe"

Don't Write "if true then return true"

When returning or setting a variable to the value of the conditional statement itself, don't use an if else block.

BAD

if name == "mark" or name == "stacy" then
   return true
else
   return false
end

GOOD

return name == "mark" or name == "stacy"

Prefer positive boolean expressions

This makes the code easier to read.

BAD

if not isHappy then
  return "sad"
else
  return "happy"
end

GOOD

if isHappy then
  return "happy"
else
  return "sad"
end