Junegunn Choi wrote in post #1033475:
> Are you sure you want to write your own code for handling Excel binary
> format?
> I suggest you try  'spreadsheet' gem.
>
> require 'spreadsheet'
> book = Spreadsheet::Workbook.new
> sheet = book.create_worksheet
> book.write 'test.xls'

Thanks Choi.

But when I use require 'spreadsheet' in my code I get the following
error:- Even though I have installed the spreadsheet gem.

 `require': no such file to load -- spreadsheet (LoadError)
        from excel.rb:1

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