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\""
# 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"""
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)
Creates a builder that will write to the given
IO
.
Instance Method Summary
-
#row(&block)
Yields a
CSV::Row
to append a row. -
#row(values : Enumerable)
Appends the given values as a single row, and then a newline.
-
#row(*values)
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, 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
!=(other)
!=,
!~(other)
!~,
==(other)
==,
===(other : JSON::Any)===(other : YAML::Any)
===(other) ===, =~(other) =~, class class, dup dup, hash(hasher)
hash hash, inspect(io : IO)
inspect inspect, itself itself, not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, tap(&block) tap, to_json(io : IO)
to_json to_json, to_pretty_json(indent : String = " ")
to_pretty_json(io : IO, indent : String = " ") to_pretty_json, to_s
to_s(io : IO) to_s, to_yaml(io : IO)
to_yaml to_yaml, try(&block) try, unsafe_as(type : T.class) forall T unsafe_as
Constructor methods inherited from class Object
from_json(string_or_io, root : String) : selffrom_json(string_or_io) : self from_json, from_yaml(string_or_io : String | IO) : self from_yaml
Constructor Detail
def self.new(io : IO, separator : Char = DEFAULT_SEPARATOR, quote_char : Char = DEFAULT_QUOTE_CHAR)
#
Creates a builder that will write to the given IO
.
Instance Method Detail
def row(&block)
#