Case语句可以被视为命令式语言中switch语句的替代。 Case采用变量/文字并使用不同的情况对其应用模式匹配。 如果任何情况匹配,Elixir将执行与该案例相关联的代码并退出case语句。 如果未找到匹配项,它将使用CaseClauseError退出语句,该CaseClauseError显示no matching clauses were found。 您应始终使用_匹配所有值的大小...
case的语法也很简单: caseexpressiondopattern_1->...pattern_2->...end case使用expression表达式做为模式匹配的右边,模式匹配成功则执行其代码块内容,并返回代码块中的返回值。无法匹配的,同样也会抛出异常, 比正常的模式匹配更高级的一点在于,case的模式可以接受when这样的gurads语句。 iex(3)>case{:ok,"hell...
和case 一样,cond语句如果没有任何匹配会抛出异常。我们可以定义一个true的条件放到最后,来处理这种意外:iex> cond do ...> 7 + 1 == 0 -> "Incorrect" ...> true -> "Catch all" ...> end "Catch all" 最后编辑于 :2018.11.29 18:08:46 ©著作权归作者所有,转载或内容合作请联系作者 0人...
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View our case studies 1/3 IT Strategy Leading private equity firm: designing an IT target operating model Our client, a leading private equity (PE) company, needed support to design a best-in-class IT target operating model that would facilitate the next stage of its rapid growth of workforc...
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3Branches0Tags Code Folders and files Name Last commit message Last commit date Latest commit bommar-lu and doomspork Update control_structures.md for better case/2 clarity (#3030) Jan 3, 2025 1d7b141·Jan 3, 2025 History 2,994 Commits ...
defmodule MediaPlayer.Actionsdodef cluster,do:MediaPlayer.Config.Database.start_link()defrun_query(query)docaseXandra.Cluster.execute(cluster(),query)do{:ok,result}->result{:error,error}->IO.inspect(error)end end defrun_query(query,params)doprepared=Xandra.Cluster.prepare!(cluster(),query)case...
1. 浅谈代码覆盖率 作为SET 和 SWE, 我们经常需要编写单元测试或集成测试用例来验证系统/应用的正确性, 但同时我们也常会质疑我们的测试是否充分了. 这时测试覆盖率是可以辅助用来衡量我们测试充分程度的一种手段, 增强发布成功率与信心, 同时给了我们更多可思考的视角. 值的注意的是代码覆盖率高不能说明代码质量...
case Integer.parse(interval_s) do {interval, ""} -> id = Application.get_env(:weather_dashboard, :sensor_id) # Send command to device topic = "commands/#{id}/set_interval" :ok = :emqtt.publish( socket.assigns[:pid], topic, ...