Contents

# Print nice-looking plain-text tables
# +--+-------+
# |id|name   |
# |--+-------|
# |1 |fasdfas|
# |2 |test   |
# +--+-------+

module Sequel
  module PrettyTable
    def self.hash_columns(records)
      columns = []
      records.each do |r|
        r.keys.each {|k| columns << k unless columns.include?(k)}
      end
      columns
    end
    
    def self.column_sizes(records, columns)
      sizes = Hash.new {0}
      columns.each do |c|
        s = c.to_s.size
        sizes[c.to_sym] = s if s > sizes[c.to_sym]
      end
      records.each do |r|
        columns.each do |c|
          s = r[c].to_s.size
          sizes[c.to_sym] = s if s > sizes[c.to_sym]
        end
      end
      sizes
    end
    
    def self.separator_line(columns, sizes)
      l = ''
      '+' + columns.map {|c| '-' * sizes[c]}.join('+') + '+'
    end
    
    def self.data_line(columns, sizes, record)
      '|' + columns.map {|c| "%-#{sizes[c]}s" % record[c].to_s}.join('|') + '|'
    end
    
    def self.header_line(columns, sizes)
      '|' + columns.map {|c| "%-#{sizes[c]}s" % c.to_s}.join('|') + '|'
    end
    
    def self.print(records, columns = nil) # records is an array of hashes
      columns ||= hash_columns(records)
      sizes = column_sizes(records, columns)
      
      puts separator_line(columns, sizes)
      puts header_line(columns, sizes)
      puts separator_line(columns, sizes)
      records.each {|r| puts data_line(columns, sizes, r)}
      puts separator_line(columns, sizes)
    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
sequel-0.1.9.12	lib/sequel/pretty_table.rb
sequel-0.2.0.1	lib/sequel/pretty_table.rb
sequel-0.2.0	lib/sequel/pretty_table.rb