ruby Matrix 輸出 格式化

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 1 require ‘matrix‘ 2  3 class Matrix 4     def to_pretty_s 5         s = "" 6         i = 0 7         while i < self.column_size 8             s += "\n" if i != 0 9             j = 010             while j < self.row_size11                 s += ‘ ‘ if j != 012                 s += self.element(i, j).to_s13                 j += 114             end15             i += 116         end17         s18     end19 20     def to_readable21         maximal_length = 1522         column_counter = 023         columns_arrays = []24         while column_counter < self.column_size25             maximum_length = 026             self.column(column_counter).each do |column_element|# Get maximal size27                 length = column_element.to_s.size28                 if length > maximal_length29                     maximum_length = length30                 end31             end # now we‘ve got the maximum size32             column_array = []33             self.column(column_counter).each do |column_element| # Add needed spaces to equalize each column34                 element_string = column_element.to_s35                 element_size = element_string.size36                 space_needed = maximal_length - element_size +137                 if space_needed > 038                     space_needed.times {element_string.prepend " "}39                     if column_counter == 040                         element_string.prepend "["41                     else42                         element_string.prepend ","43                     end  44                 end45                 column_array << element_string46             end47             columns_arrays << column_array # Now columns contains equal size strings48             column_counter += 149         end50         row_counter = 051         while row_counter < self.row_size52             columns_arrays.each do |column|53                 element = column[row_counter]54                 print element #Each column yield the correspondant row in order55             end56             print "]\n"57             row_counter += 158         end59     end60 61     def my_print62         matrix = self.to_a63         field_size = matrix.flatten.collect{|i|i.to_s.size}.max64         matrix.each do |row|65             puts (row.collect{|i| ‘ ‘ * (field_size - i.to_s.size) + i.to_s}).join(‘  ‘)    66         end67     end68 end69 70 m = Matrix[[12345678910, 333, 22.111], [3, 0.12345678, 3], [-333, 3, 4]]71 72 puts m # same as puts m.to_s73 puts m.to_pretty_s74 p m.to_pretty_s75 m.to_readable76 m.my_print77 # Matrix[[12345678910, 333, 22.111], [3, 0.12345678, 3], [-333, 3, 4]]78 # 12345678910 333 22.11179 # 3 0.12345678 380 # -333 3 481 # "12345678910 333 22.111\n3 0.12345678 3\n-333 3 4"82 # [     12345678910,             333,          22.111]83 # [               3,      0.12345678,               3]84 # [            -333,               3,               4]85 # 12345678910          333       22.11186 #           3   0.12345678            387 #        -333            3            4

 

ruby Matrix 輸出 格式化