In Files

  • csv.rb

Parent

Object

Included Modules

  • Enumerable

CSV::Reader

CSV formatted string/stream reader.

EXAMPLE

read CSV lines untill the first column is 'stop'.

CSV::Reader.parse(File.open('bigdata', 'rb')) do |row|
  p row
  break if !row[0].is_null && row[0].data == 'stop'
end

Public Class Methods

create(str_or_readable, fs = ',', rs = nil) click to toggle source

Returns reader instance.

 
               # File csv.rb, line 542
def Reader.create(str_or_readable, fs = ',', rs = nil)
  case str_or_readable
  when IO
    IOReader.new(str_or_readable, fs, rs)
  when String
    StringReader.new(str_or_readable, fs, rs)
  else
    IOReader.new(str_or_readable, fs, rs)
  end
end
new(dev) click to toggle source 
 
               # File csv.rb, line 577
def initialize(dev)
  raise RuntimeError.new('Do not instanciate this class directly.')
end
parse(str_or_readable, fs = ',', rs = nil, &block) click to toggle source

Parse CSV data and get lines. Given block is called for each parsed row. Block value is always nil. Rows are not cached for performance reason.

 
               # File csv.rb, line 528
def Reader.parse(str_or_readable, fs = ',', rs = nil, &block)
  reader = Reader.create(str_or_readable, fs, rs)
  if block
    reader.each do |row|
      yield(row)
    end
    reader.close
    nil
  else
    reader
  end
end

Public Instance Methods

close() click to toggle source 
 
               # File csv.rb, line 571
def close
  terminate
end
each() click to toggle source 
 
               # File csv.rb, line 553
def each
  while true
    row = []
    parsed_cells = get_row(row)
    if parsed_cells == 0
      break
    end
    yield(row)
  end
  nil
end
shift() click to toggle source 
 
               # File csv.rb, line 565
def shift
  row = []
  parsed_cells = get_row(row)
  row
end