instance method CSV#each

each {|row| ... } -> nil[permalink][rdoc]

各行に対してブロックを評価します。

データソースは読み込み用にオープンされていなければなりません。

例 CSV.new 時に :header => true を指定した場合

require "csv"

users = <<CSV
id,first name,last name,age
1,taro,tanaka,20
2,jiro,suzuki,18
3,ami,sato,19
4,yumi,adachi,21
CSV
csv = CSV.new(users, headers: true)
csv.each do |row|
  p row
end

# => #<CSV::Row "id":"1" "first name":"taro" "last name":"tanaka" "age":"20">
# => #<CSV::Row "id":"2" "first name":"jiro" "last name":"suzuki" "age":"18">
# => #<CSV::Row "id":"3" "first name":"ami" "last name":"sato" "age":"19">
# => #<CSV::Row "id":"4" "first name":"yumi" "last name":"adachi" "age":"21">

例 CSV.new 時に :header => true を指定しない場合

require "csv"

users = <<CSV
id,first name,last name,age
1,taro,tanaka,20
2,jiro,suzuki,18
3,ami,sato,19
4,yumi,adachi,21
CSV
csv = CSV.new(users)
csv.each do |row|
  p row
end

# => ["id", "first name", "last name", "age"]
# => ["1", "taro", "tanaka", "20"]
# => ["2", "jiro", "suzuki", "18"]
# => ["3", "ami", "sato", "19"]
# => ["4", "yumi", "adachi", "21"]