小编Dav*_*oss的帖子

我在iex>中更新我的@doc以测试它的外观.我遇到的问题是我必须退出iex才能查看更新的@doc文档.有没有办法在使用r()时重新加载模块@doc变量？

iex -S mix 
iex> h Coordinate.island/1 
      ## Examples 
      iex> {:ok, coord } = Cordinate.start_link
         Cordinate.island(coord) 
         :falls_town

更新@doc以返回:none而不是:falls_town并保存文件.

iex> r(Coordinate) 
iex> h Coordinate.island/1 
   # issue: still showing the old @doc example 
   ## Examples 
   iex> {:ok, coord } = Cordinate.start_link
        Cordinate.island(coord) 
        :falls_town # should be :none 

如何将管道占位符传递给函数中的第二个参数？

defdefmodule CamelCase do
  str = "The_Stealth_Warrior"
  def to_camel_case(str) do 
    str 
    |> Regex(~r/_/, 'need_to_pass_str_argument_here', "") 
    |> String.split(" ")
    |> Enum.map(&(String.capitalize(&1)))
    |> List.to_string   
  end
end


ExUnit.start 

defmodule TestCamelCase do
  use ExUnit.Case
  import CamelCase, only: [to_camel_case: 1]

  test "to_camel_case" do
    assert to_camel_case("The_Stealth_Warrior") == "TheStealthWarrior"
  end
end

# Error 
iex> 
  ** (FunctionClauseError) no function clause matching in Regex.replace/4
  (elixir) lib/regex.ex:504: Regex.replace("The_Stealth_Warrior", ~r/\W/, " ", [])