module CArray::TableMethods
Attributes
column_names[R]
Public Instance Methods
column(name)
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# File lib/carray/table.rb, line 22 def column (name) if name.is_a?(Integer) return self[false, name] elsif @column_names case name when Symbol if i = @column_names.index(name) or i = @column_names.index(name.to_s) return self[false, i] end when String if i = @column_names.index(name) or i = @column_names.index(name.intern) return self[false, i] end end end return nil end
column_names=(list)
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# File lib/carray/table.rb, line 8 def column_names= (list) if self.empty? return elsif list.nil? return elsif list.empty? return elsif list and list.size != dim1 raise "column_names list size is invalid (#{list.size} <=> #{dim1} )" else @column_names = list end end
row(i)
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# File lib/carray/table.rb, line 40 def row (i) keys = @column_names || (0...dim0).to_a output = {} data = self[i, nil] keys.each_with_index do |key, j| output[key] = data[j] end return output end
rows(arg)
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# File lib/carray/table.rb, line 50 def rows (arg) table = self[arg, nil].to_ca table.extend(CA::TableMethods) table.column_names = @column_names return table end
select() { |self| ... }
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# File lib/carray/table.rb, line 57 def select idx = yield(self) case idx.data_type when CA_BOOLEAN idx = idx.where end return rows(+idx) end