Trying to do some fancy formatting and getting an error message.
Since I know .center is a method the error message can't be the
ultimate truth.  Anyone ?

                          Table of Contents    <------This is corect
toc.rb:8: undefined method `center' for [2]:Array (NoMethodError)
>Exit code: 1

toc = ['Table of Contents', 'Chapter 1', 'Getting Started',
        'page 1', 'Chapter 2', 'Numbers', 'page 9',
        'Chapter 3', 'Letter', 'page 13']

        line_width = 70

        puts(              toc[0].center(line_width))
        puts(              toc[1].ljust(line_width/2) +
[2].center(line_width) +[3].rjust(line_width/2))
        puts(              toc[4][5][6])
        puts(              toc[7][8][9])

Tia
Stuart