Elixir Basic
Style Guide
正则：
Regex.run ~r{[aeiou]}, "caterpillar"
Regex.scan ~r{[aeiou]}, "caterpillar"
Regex.split ~r{[aeiou]}, "caterpillar"
Regex.replace ~r{[aeiou]}, "caterpillar", "*"
集合类型
Tuple
{1, 2}
List
[1, 2, 3] ++ [4, 5, 6] # [1,2,3,4,5,6]
1 in [1,2,3,4] # true
Keyword List
[name: "Dave", city: "Dallas", likes: "Programming"]
其实是 tuple 的 list
[{:name, "Dave"}, {:city, "Dallas"}, {:likes, "Programming"}]
Map
states = %{"AL" => "Alabama", "WI" => "Wisconsin"}
states["AL"]
如果 key 是 atom 的话，可以直接使用 dot notation：
colors = %{red: 0xff0000, green: 0x00ff00, blue: 0x0000ff}
colors.red # 16711680
& notation
使用 & notation 创建匿名函数：
add_one = &(&1 + 1) # same as add_one = fn (n) -> n + 1 end
sum = &(&1 + &2)