class CSV::Builder

Overview

A CSV Builder writes CSV to an IO.

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.cr

Class Method Summary

Instance Method Summary

Instance methods inherited from class Reference

==(other)
==(other : self) ==, dup dup, hash hash, inspect(io : IO) : Nil inspect, object_id : UInt64 object_id, same?(other : Reference)
same?(other : Nil) same?, to_s(io : IO) : Nil to_s

Instance methods inherited from class Object

!=(other) !=, !~(other) !~, ==(other) ==, ===(other)
===(other : YAML::Any)
===(other : JSON::Any) ===, =~(other) =~, class class, crystal_type_id crystal_type_id, dup dup, hash hash, inspect(io : IO)
inspect inspect, itself itself, not_nil! not_nil!, tap(&block) tap, to_json to_json, to_pretty_json(io : IO)
to_pretty_json to_pretty_json, to_s
to_s(io : IO) to_s, to_yaml
to_yaml(io : IO) to_yaml, try(&block) try

Class methods inherited from class Object

==(other : Class) ==, ===(other) ===, cast(other) : self cast, clone clone, dup dup, from_json(string_or_io, root : String) : self
from_json(string_or_io) : self from_json, from_yaml(string : String) : self from_yaml, hash hash, inspect(io) inspect, name : String name, to_s(io) to_s, |(other : U.class) |

Class Method Detail

def self.new(io : IO) #

Creates a builder that will write to the given IO.


[View source]

Instance Method Detail

def row(*values) #

Appends the given values as a single row, and then a newline.


[View source]
def row(values : Enumerable) #

Appends the given values as a single row, and then a newline.


[View source]
def row(&block) #

Yields a CSV::Row to append a row. A newline is appended to IO after the block exits.


[View source]