class CSV::Builder
Overview
A CSV Builder writes CSV to an IO
.
require "csv"
result = CSV.build do |csv|
# A row can be written by specifying several values
csv.row "Hello", 1, 'a', "String with \"quotes\"", '"', :sym
# Or an enumerable
csv.row [1, 2, 3]
# Or using a block, and appending to the row
csv.row do |row|
# Appending a single value
row << 4
# Or multiple values
row.concat 5, 6
# Or an enumerable
row.concat [7, 8]
end
end
puts result
Output:
Hello,1,a,"String with ""quotes""","""",sym
1,2,3
4,5,6,7,8
Defined in:
csv/builder.crConstructors
-
.new(io : IO, separator : Char = DEFAULT_SEPARATOR, quote_char : Char = DEFAULT_QUOTE_CHAR, quoting : Quoting = Quoting::RFC)
Creates a builder that will write to the given
IO
.
Instance Method Summary
-
#row(&)
Yields a
CSV::Row
to append a row. -
#row(values : Enumerable) : Nil
Appends the given values as a single row, and then a newline.
-
#row(*values) : Nil
Appends the given values as a single row, and then a newline.
Instance methods inherited from class Reference
==(other : self)==(other : JSON::Any)
==(other : YAML::Any)
==(other) ==, dup dup, hash(hasher) hash, initialize initialize, inspect(io : IO) : Nil inspect, object_id : UInt64 object_id, pretty_print(pp) : Nil pretty_print, same?(other : Reference) : Bool
same?(other : Nil) same?, to_s(io : IO) : Nil to_s
Constructor methods inherited from class Reference
new
new,
unsafe_construct(address : Pointer, *args, **opts) : self
unsafe_construct
Class methods inherited from class Reference
pre_initialize(address : Pointer)
pre_initialize
Instance methods inherited from class Object
! : Bool
!,
!=(other)
!=,
!~(other)
!~,
==(other)
==,
===(other : JSON::Any)===(other : YAML::Any)
===(other) ===, =~(other) =~, as(type : Class) as, as?(type : Class) as?, class class, dup dup, hash(hasher)
hash hash, in?(collection : Object) : Bool
in?(*values : Object) : Bool in?, inspect(io : IO) : Nil
inspect : String inspect, is_a?(type : Class) : Bool is_a?, itself itself, nil? : Bool nil?, not_nil!(message)
not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, responds_to?(name : Symbol) : Bool responds_to?, tap(&) tap, to_json(io : IO) : Nil
to_json : String to_json, to_pretty_json(indent : String = " ") : String
to_pretty_json(io : IO, indent : String = " ") : Nil to_pretty_json, to_s(io : IO) : Nil
to_s : String to_s, to_yaml(io : IO) : Nil
to_yaml : String to_yaml, try(&) try, unsafe_as(type : T.class) forall T unsafe_as
Class methods inherited from class Object
from_json(string_or_io, root : String)from_json(string_or_io) from_json, from_yaml(string_or_io : String | IO) from_yaml
Constructor Detail
def self.new(io : IO, separator : Char = DEFAULT_SEPARATOR, quote_char : Char = DEFAULT_QUOTE_CHAR, quoting : Quoting = Quoting::RFC)
#
Creates a builder that will write to the given IO
.
Instance Method Detail
def row(&)
#
Appends the given values as a single row, and then a newline.
Appends the given values as a single row, and then a newline.