diff options
Diffstat (limited to 'doc/csv/options/parsing')
-rw-r--r-- | doc/csv/options/parsing/converters.rdoc | 37 | ||||
-rw-r--r-- | doc/csv/options/parsing/header_converters.rdoc | 40 |
2 files changed, 45 insertions, 32 deletions
diff --git a/doc/csv/options/parsing/converters.rdoc b/doc/csv/options/parsing/converters.rdoc index 993803c5d0..211fa48de6 100644 --- a/doc/csv/options/parsing/converters.rdoc +++ b/doc/csv/options/parsing/converters.rdoc @@ -1,41 +1,42 @@ ====== Option +converters+ -Specifies a single field converter name or \Proc, -or an \Array of field converter names and Procs. - +Specifies converters to be used in parsing fields. See {Field Converters}[#class-CSV-label-Field+Converters] Default value: CSV::DEFAULT_OPTIONS.fetch(:converters) # => nil -The value may be a single field converter name: +The value may be a field converter name +(see {Stored Converters}[#class-CSV-label-Stored+Converters]): str = '1,2,3' # Without a converter - ary = CSV.parse_line(str) - ary # => ["1", "2", "3"] + array = CSV.parse_line(str) + array # => ["1", "2", "3"] # With built-in converter :integer - ary = CSV.parse_line(str, converters: :integer) - ary # => [1, 2, 3] + array = CSV.parse_line(str, converters: :integer) + array # => [1, 2, 3] -The value may be an \Array of field converter names: +The value may be a converter list +(see {Converter Lists}[#class-CSV-label-Converter+Lists]): str = '1,3.14159' # Without converters - ary = CSV.parse_line(str) - ary # => ["1", "3.14159"] + array = CSV.parse_line(str) + array # => ["1", "3.14159"] # With built-in converters - ary = CSV.parse_line(str, converters: [:integer, :float]) - ary # => [1, 3.14159] + array = CSV.parse_line(str, converters: [:integer, :float]) + array # => [1, 3.14159] The value may be a \Proc custom converter: +(see {Custom Field Converters}[#class-CSV-label-Custom+Field+Converters]): str = ' foo , bar , baz ' # Without a converter - ary = CSV.parse_line(str) - ary # => [" foo ", " bar ", " baz "] + array = CSV.parse_line(str) + array # => [" foo ", " bar ", " baz "] # With a custom converter - ary = CSV.parse_line(str, converters: proc {|field| field.strip }) - ary # => ["foo", "bar", "baz"] + array = CSV.parse_line(str, converters: proc {|field| field.strip }) + array # => ["foo", "bar", "baz"] -See also {Custom Converters}[#class-CSV-label-Custom+Converters] +See also {Custom Field Converters}[#class-CSV-label-Custom+Field+Converters] --- diff --git a/doc/csv/options/parsing/header_converters.rdoc b/doc/csv/options/parsing/header_converters.rdoc index 329d96a897..309180805f 100644 --- a/doc/csv/options/parsing/header_converters.rdoc +++ b/doc/csv/options/parsing/header_converters.rdoc @@ -1,6 +1,7 @@ ====== Option +header_converters+ -Specifies a \String converter name or an \Array of converter names. +Specifies converters to be used in parsing headers. +See {Header Converters}[#class-CSV-label-Header+Converters] Default value: CSV::DEFAULT_OPTIONS.fetch(:header_converters) # => nil @@ -10,22 +11,33 @@ except that: - The converters apply only to the header row. - The built-in header converters are +:downcase+ and +:symbol+. -Examples: +This section assumes prior execution of: str = <<-EOT + Name,Value foo,0 bar,1 baz,2 EOT - headers = ['Name', 'Value'] # With no header converter - csv = CSV.parse(str, headers: headers) - csv.headers # => ["Name", "Value"] - # With header converter :downcase - csv = CSV.parse(str, headers: headers, header_converters: :downcase) - csv.headers # => ["name", "value"] - # With header converter :symbol - csv = CSV.parse(str, headers: headers, header_converters: :symbol) - csv.headers # => [:name, :value] - # With both - csv = CSV.parse(str, headers: headers, header_converters: [:downcase, :symbol]) - csv.headers # => [:name, :value] + table = CSV.parse(str, headers: true) + table.headers # => ["Name", "Value"] + +The value may be a header converter name +(see {Stored Converters}[#class-CSV-label-Stored+Converters]): + table = CSV.parse(str, headers: true, header_converters: :downcase) + table.headers # => ["name", "value"] + +The value may be a converter list +(see {Converter Lists}[#class-CSV-label-Converter+Lists]): + header_converters = [:downcase, :symbol] + table = CSV.parse(str, headers: true, header_converters: header_converters) + table.headers # => [:name, :value] + +The value may be a \Proc custom converter +(see {Custom Header Converters}[#class-CSV-label-Custom+Header+Converters]): + upcase_converter = proc {|field| field.upcase } + table = CSV.parse(str, headers: true, header_converters: upcase_converter) + table.headers # => ["NAME", "VALUE"] + +See also {Custom Header Converters}[#class-CSV-label-Custom+Header+Converters] + |