Class: IO

Inherits:
Object show all
Defined in:
lib/webget_ramp/io.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.readrows(name, options = {}) ⇒ Object

Reads the entire file specified by name as individual lines as with IO#readlines, and returns those lines in an array of rows, where each row is an array of fields.

Example

IO.readrows("my.tsv")
 => [["A1","B1","C1"],["A2","B2","C2"],["A3","B3","C3"]]

Options

  • Rows are separated by row option, which defaults to Ruby’s record separator $/ or “n”

  • Cols are separated by col option, which defaults to Ruby’s string split separator $; or “t”

Example with options suitable for a file using TSV (Tab Separated Values)

IO.readrows("my.tsv", :row=>"\n", :col=>"\t")

Note: the col option is sent along to String#split, so can be a string or a regexp.

See:

  • File#readline

  • File#readlines

  • File#readrow



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# File 'lib/webget_ramp/io.rb', line 25

def IO.readrows(name, options={})
  row_sep||=options[:row]||$/||"\n"
  col_sep||=options[:col]||$;||"\t"
  return IO.readlines(name, row_sep).map{|line| line.chomp(row_sep).split(col_sep)}
end

Instance Method Details

#readrow(options = {}) ⇒ Object

Read a line as with IO#readline and return the line as a row of fields.

Example

file = File.new("my.tsv")
file.readrow() => ["A1","B1","C1"]
file.readrow() => ["A2","B2","C2"]
file.readrow() => ["A3","B3","C3"]]

Options

  • Rows are separated by row option, which defaults to Ruby’s record separator $/ or “n”

  • Cols are separated by col option, which defaults to Ruby’s string split separator $; or “t”

Example with options suitable for a file using TSV (Tab Separated Values)

file = File.new("my.tsv")
file.readrow(:row=>"\n", :col=>"\t") => ["A1","B1","C1"] 
file.readrow(:row=>"\n", :col=>"\t") => ["A2","B2","C2"] 
file.readrow(:row=>"\n", :col=>"\t") => ["A3","B3","C3"]

Note: the col option is sent along to String#split, so can be a string or a regexp.

See:

  • File#readline

  • File#readlines

  • File#readrows



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# File 'lib/webget_ramp/io.rb', line 57

def readrow(options={})
  row_sep||=options[:row]||$/||"\n"
  col_sep||=options[:col]||$;||"\t"
 return readline(row_sep).chomp(row_sep).split(col_sep)
end