A couple of issues

[cypressious]

• val name = null is of type Nothing?
• The multi line string will contain a lot of whitespace if you don't call trimMargin
• The when snippet is wrong. The branch isOdd(x) will never be triggered because it compares the value of the string x to the boolean result of the call. If you want to have method calls in the when branches, you need to pull the argument out of the when-expression.
• The correct name for "Tuples" is "Data Classes" paired with "Destructuring". Tuples are something different.
• The correct name for "Object instance" is "Constructor call"
• You can leave out the body of a class if it's empty
• The correct name for "Attributes" is "Primary Constructor"
• A better name for "Multiple Constructors" is "Optional Arguments in Constructors (as alternative to overloaded constructors)"

[fabiomsr]

Fixed, thanks you.