CSV#lineno

csv.line_no → integer

# File tmp/rubies/ruby-3.3.0/lib/csv.rb, line 2223
def lineno
  if @writer
    @writer.lineno
  else
    parser.lineno
  end
end

Returns the count of the rows parsed or generated.

Parsing:

Example

string = "foo,0\nbar,1\nbaz,2\n"
path = 't.csv'
File.write(path, string)
CSV.open(path) do |csv|
  csv.each do |row|
    p [csv.lineno, row]
  end
end

Output:

Example

[1, ["foo", "0"]]
[2, ["bar", "1"]]
[3, ["baz", "2"]]

Generating:

Example

CSV.generate do |csv|
  p csv.lineno; csv << ['foo', 0]
  p csv.lineno; csv << ['bar', 1]
  p csv.lineno; csv << ['baz', 2]
end

Output:

Example

0
1
2

See also #line #max_field_size #liberal_parsing? #normalize_converters also in 3.2 · 3.1 · 3.0

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