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to_array.rb

This Ruby code snippet demonstrates how to read an Excel spreadsheet using the Roo gem and store the data in a two-dimensional array. The code first requires the Roo gem by adding ‘require “roo”’ at the top of the file. It then creates a new Roo::Excelx object called xlsx that is initialized with the path to an Excel spreadsheet (‘input/roo/book.xlsx’).

The next line of code retrieves a sheet from the Excel spreadsheet called ‘mysheet’ using the xlsx.sheet() method. The data in this sheet is then iterated over using the each do |row| block, and each row is added to the two_dimensional array. Finally, the entire contents of the two-dimensional array are returned at the end of the snippet.

Note that this code assumes that the Excel spreadsheet has a sheet called ‘mysheet’ and that it contains data in the form of rows and columns.

Additional Note

This Ruby script utilizes the roo library to read data from an Excel file and store it in a two-dimensional array. Here’s what it does:

  1. Require ‘roo’:
    • This line imports the roo library into your Ruby script, enabling you to work with Excel files.
  2. Initialize an Empty Array:
    • two_dimensional = []: This line initializes an empty array called two_dimensional, which will store the data read from the Excel sheet.
  3. Open Excel File and Select Sheet:
    • xlsx = Roo::Excelx.new('./book.xlsx'): This line creates a new instance of Roo::Excelx, specifying the Excel file book.xlsx to work with.
    • sh1 = xlsx.sheet('mysheet'): This line selects a specific sheet named 'mysheet' from the Excel file and assigns it to the variable sh1.
  4. Iterate Through Each Row:
    • sh1.each do |row|: This loop iterates through each row in the selected sheet ('mysheet').
    • two_dimensional << row: Within the loop, each row is appended to the two_dimensional array, effectively creating a two-dimensional array where each element represents a row in the Excel sheet.
  5. Return the Two-Dimensional Array:
    • two_dimensional: Finally, the script returns the two-dimensional array containing the data read from the Excel sheet.

This script provides a straightforward way to read data from an Excel file into a two-dimensional array in Ruby, making it accessible for further processing or manipulation within your script.

Ruby code snippet

require 'roo'
#=> true

two_dimensional = []
#=> []
xlsx = Roo::Excelx.new('input/roo/book.xlsx')
#=> 
<#Roo::Excelx:2350 @tmpdir @shared @filename @sheet_files @sheet_names @sheets @...
sh1 = xlsx.sheet('mysheet')
#=> 
<#Roo::Excelx:2350 @tmpdir @shared @filename @sheet_files @sheet_names @sheets @...
sh1.each do |row|
  two_dimensional << row
end
#=> 1
two_dimensional
#=> 
[["key", "value"],
 [1.0, "a"],
 [2.0, "b"],
 [3.0, "c"],
 [4.0, "d"],
 [5.0, "e"],
 [6.0, "f"]]

Executed with Ruby 3.4.4.