class IOStreams::Row::Reader
Converts each line of an input stream into an array for every line
Public Class Methods
file(file_name, original_file_name: file_name, delimiter: $/, **args) { |new(io, original_file_name: original_file_name, **args)| ... }
click to toggle source
When reading from a file also add the line reader stream
# File lib/io_streams/row/reader.rb, line 16 def self.file(file_name, original_file_name: file_name, delimiter: $/, **args) IOStreams::Line::Reader.file(file_name, original_file_name: original_file_name, delimiter: delimiter) do |io| yield new(io, original_file_name: original_file_name, **args) end end
new(line_reader, cleanse_header: true, original_file_name: nil, **args)
click to toggle source
Create a Tabular
reader to return the stream rows as arrays.
Parameters
delimited: [#each] Anything that returns one line / record at a time when #each is called on it. format: [Symbol] :csv, :hash, :array, :json, :psv, :fixed For all other parameters, see Tabular::Header.new
# File lib/io_streams/row/reader.rb, line 32 def initialize(line_reader, cleanse_header: true, original_file_name: nil, **args) unless line_reader.respond_to?(:each) raise(ArgumentError, "Stream must be a IOStreams::Line::Reader or implement #each") end @tabular = IOStreams::Tabular.new(file_name: original_file_name, **args) @line_reader = line_reader @cleanse_header = cleanse_header end
stream(line_reader, **args) { |line_reader| ... }
click to toggle source
Read a line as an Array at a time from a stream. Note:
-
The supplied stream must already be a line stream, or a stream that responds to :each
# File lib/io_streams/row/reader.rb, line 8 def self.stream(line_reader, **args) # Pass-through if already a row reader return yield(line_reader) if line_reader.is_a?(self.class) yield new(line_reader, **args) end
Public Instance Methods
each() { |columns| ... }
click to toggle source
# File lib/io_streams/row/reader.rb, line 42 def each @line_reader.each do |line| if @tabular.header? columns = @tabular.parse_header(line) @tabular.cleanse_header! if @cleanse_header yield columns else yield @tabular.row_parse(line) end end end