paiza.ioでelixir その94

概要

paiza.ioでelixirやってみた。
Record使ってみた。

サンプルコード

require Record

Record.is_record({User, "john", 27})
|> IO.inspect

Record.is_record({})
|> IO.inspect

record = {User, "john", 27}
Record.is_record(record, User)
|> IO.inspect

defmodule User do
	require Record
	Record.defrecord(:user, name: "meg", age: "25")
end
defmodule Main do
    import User
    record = user()				#=> {:user, "meg", 25}
    record = user(age: 26)      #=> {:user, "meg", 26}
    user(record, :name)         #=> "meg"
    user(record, age: 26)       #=> {:user, "meg", 26}
    user(:name)                 #=> 1
    user(record)                #=> [name: "meg", age: 26]
    record = user()             #=> {:user, "meg", 25}
    user(name: name) = record
    name                        #=> "meg"
end

Record.extract(:file_info, from_lib: "kernel/include/file.hrl")
|> IO.inspect

実行結果

true
false
true
[
  size: :undefined,
  type: :undefined,
  access: :undefined,
  atime: :undefined,
  mtime: :undefined,
  ctime: :undefined,
  mode: :undefined,
  links: :undefined,
  major_device: :undefined,
  minor_device: :undefined,
  inode: :undefined,
  uid: :undefined,
  gid: :undefined
]

成果物

以上。