Option converters¶ ↑

Specifies converters to be used in parsing fields. See Field Converters

Default value:

CSV::DEFAULT_OPTIONS.fetch(:converters) # => nil

The value may be a field converter name (see Stored Converters):

str = '1,2,3'
# Without a converter
array = CSV.parse_line(str)
array # => ["1", "2", "3"]
# With built-in converter :integer
array = CSV.parse_line(str, converters: :integer)
array # => [1, 2, 3]

The value may be a converter list (see Converter Lists):

str = '1,3.14159'
# Without converters
array = CSV.parse_line(str)
array # => ["1", "3.14159"]
# With built-in converters
array = CSV.parse_line(str, converters: [:integer, :float])
array # => [1, 3.14159]

The value may be a Proc custom converter: (see Custom Field Converters):

str = ' foo  ,  bar  ,  baz  '
# Without a converter
array = CSV.parse_line(str)
array # => [" foo  ", "  bar  ", "  baz  "]
# With a custom converter
array = CSV.parse_line(str, converters: proc {|field| field.strip })
array # => ["foo", "bar", "baz"]

See also Custom Field Converters

---

Raises an exception if the converter is not a converter name or a Proc:

str = 'foo,0'
# Raises NoMethodError (undefined method `arity' for nil:NilClass)
CSV.parse(str, converters: :foo)

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