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.cr Constructors
Instance Method Summary
Instance methods inherited from class Reference
==(other : self)
==(other : JSON::Any)
==(other : YAML::Any)
==(other) ==,
dup dup,
hash(hasher) hash,
inspect(io : IO) : Nil inspect,
object_id : UInt64 object_id,
pretty_print(pp) : Nil pretty_print,
same?(other : Reference)
same?(other : Nil) same?,
to_s(io : IO) : Nil to_s Constructor methods inherited from class Reference
new new 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?(*values : Object) : Bool
in?(collection) : Bool in?,
inspect : String
inspect(io : IO) : Nil inspect,
is_a?(type : Class) : Bool is_a?,
itself itself,
nil? : Bool nil?,
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)
to_json to_json,
to_pretty_json(io : IO, indent : String = " ")
to_pretty_json(indent : String = " ") to_pretty_json,
to_s : String
to_s(io : IO) : Nil to_s,
to_yaml(io : IO)
to_yaml 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)Source
Creates a builder that will write to the given IO.
Instance Method Detail
Yields a CSV::Row to append a row. A newline is appended to IO after the block exits.
Appends the given values as a single row, and then a newline.
def row(*values)Source
Appends the given values as a single row, and then a newline.