an

exception will be thrown on line 9.

an

exception will be thrown on line 7.

line

‘The red color’ will be print.

line

‘The  color’ will be print.

prop_accessor

attr_accessor

attr_reader

attr_writer

an

exception will be thrown on line 5.

line

‘The  color’ will be print.

line

‘The red color’ will be print.

an

exception will be thrown on line 6.

an

exception will be thrown on line 4.

line

‘blue’ will be print.

line

‘red’ will be print.

an

exception will be thrown on line 8.

line

’color: red, border: solid’.

an

exception is thrown.

line

’color: solid, border: ’.

line

’color: solid, border: nil’.

line

’color: red, border: ’.

line

’color: red, border: solid’.

an exception is thrown.

line

’color: red, border: nil.

line

‘The  color’.

line

‘The red color’.

line

‘The nil color’.

an

exception is thrown.

an

exception is thrown.

line

‘The red color’.

line

‘The nil color’.

line

‘The  color’.

initialize

is a special Ruby method.

initialize

method can be called explicitly using object context.

initialize

method is called when you create a Ruby object.

initialize

method can be used for initialize instance variable.

line

‘The red color’.

line

‘The  color’.

line

‘The nil color’.

an

exception is thrown.