如何从另一个lua文件加载数据? [英] How do I load data from another lua file?

问题描述

我有一个主要的lua文件app.lua，在该应用程序中有一个加载数据"按钮.注意:LUA 5.1不是5.2

I have a main lua file app.lua , and in that app I have a button to "load data" in. NOTE: LUA 5.1 not 5.2

数据文件是一个 lua 文件，里面也有表格.

The data file is a lua file as well with tables in it.

data1 = {
  {a,b,c},
  {1,2,3}
}
data2 = {
  {d,e,f}
}

目标是在我选择加载文件时使这些表可用于应用程序.

The goal was to make those tables available to the app anytime I choose to load the file.

我在lua网站上尝试了该示例

I tried the example from the lua site

    function dofile (filename)
      local f = assert(loadfile(filename))
      return f()
    end

但是f()只是打印大量字符串.例如，我似乎无法访问 f.data1[1].

but f() is just printing a massive string. I can't seem to access f.data1[1] for example.

推荐答案

您正在加载的文件不是数据表.那是一段代码，可执行的匿名函数.您在 return f() 语句中运行该代码.

The file you're loading is not a data table. That's a piece of code, anonymous function that is executable. You run that code in return f() statement.

但是请查看该代码的作用-它不返回任何内容.而是分配两个全局变量，即 data1 和 data2 .例如，您可以将它们作为 data1 [1] 来访问.

But see what that code does - it doesn't return anything. Instead it assigns two global variables, data1 and data2. You can access those as data1[1] for example.

您可以返回正在加载的文件中的数据，这样就不会污染全局环境，并且可能看起来像您想象的那样:

You could return the data in the file being loaded, that way it wouldn't pollute the global environment, and probably will look like you imagined it to be:

return {
  data1 = { {a,b,c}, {1,2,3} },
  data2 = { d,e,f}
}

在其他文件中:

local f = assert(loadfile(filename))
my_data = f()
print(my_data.data1[1][1])

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