是否存在将 lua 表（作为字符串）转换为 javascript 数组的干净方法？ （反之亦然）

Question

EDIT: Take a lua table as a string, and use javascript to convert it to a javascript array. No programming in lua.

So a lua table is just an associative array in a different format.

    --LUA TABLE EXAMPLE
    {
    ["glow"] = true,
    ["xOffset"] = -287.99981689453,
    ["yOffset"] = -227.55575561523,
    ["anchorPoint"] = "CENTER",
    ["cooldownSwipe"] = true,
    ["customTextUpdate"] = "update",
    ["cooldownEdge"] = false,
    ["icon"] = true,
    ["useglowColor"] = false,
    ["internalVersion"] = 24,
    ["keepAspectRatio"] = false,
    ["animation"] = {
        ["start"] = {
            ["duration_type"] = "seconds",
            ["type"] = "none",
        },
        ["main"] = {
            ["duration_type"] = "seconds",
            ["type"] = "none",
        },
        ["finish"] = {
            ["duration_type"] = "seconds",
            ["type"] = "none",
        },
    }

I've looked around for some javascript functions or libraries to do this though I've only come across some lua libraries to convert json to a lua table. The lua table will always be in a string. Does there exist a way of doing this?

Answer 1

You can to do it manually to make it a valid JSON then parse it:

 const luaStr = `{ ["glow"] = true, ["xOffset"] = -287.99981689453, ["yOffset"] = -227.55575561523, ["anchorPoint"] = "CENTER", ["cooldownSwipe"] = true, ["customTextUpdate"] = "update", ["cooldownEdge"] = false, ["icon"] = true, ["useglowColor"] = false, ["internalVersion"] = 24, ["keepAspectRatio"] = false, ["animation"] = { ["start"] = { ["duration_type"] = "seconds", ["type"] = "none", }, ["main"] = { ["duration_type"] = "seconds", ["type"] = "none", }, ["finish"] = { ["duration_type"] = "seconds", ["type"] = "none", }, }}`; const result = luaStr.replace(/\[|\]/g, '') // remove the brackets.replace(/=/g, ':') // replace the = with: .replace(/(\,)(?=\s*})/g, ''); // remove trailing commas const parsed = JSON.parse(result); console.log(result);

Answer 2

This is only a partial solution. It could fail in some cases where the text inside a string matches the key syntax. But that may not be a concern for you.

 const lua = ` { ["glow"] = true, ["xOffset"] = -287.99981689453, ["yOffset"] = -227.55575561523, ["anchorPoint"] = "CENTER", ["cooldownSwipe"] = true, ["customTextUpdate"] = "update", ["cooldownEdge"] = false, ["icon"] = true, ["useglowColor"] = false, ["internalVersion"] = 24, ["keepAspectRatio"] = false, ["animation"] = { ["start"] = { ["duration_type"] = "seconds", ["type"] = "none", }, ["main"] = { ["duration_type"] = "seconds", ["type"] = "none", }, ["finish"] = { ["duration_type"] = "seconds", ["type"] = "none", }, } }` const lua2json = lua => JSON.parse (lua.replace ( /\[([^\[\]]+)\]\s*=/g, (s, k) => `${k}:` ).replace (/,(\s*)\}/gm, (s, k) => `${k}}`)) console.log ( lua2json (lua) )

I didn't know if you were looking to create JSON or an object. I chose the latter, but you could always remove the JSON.parse wrapper.

Answer 3

Here is something that you might not know, { ["someString"]: 2 } is valid javascript and will evaluate to {someString: 2} which is valid json. The only issue is it needs to be evaluated, which means using eval (which you really never should, if you can avoid it).

 const luaStr = `{ ["glow"] = true, ["xOffset"] = -287.99981689453, ["yOffset"] = -227.55575561523, ["anchorPoint"] = "CENTER", ["cooldownSwipe"] = true, ["customTextUpdate"] = "update", ["cooldownEdge"] = false, ["icon"] = true, ["useglowColor"] = false, ["internalVersion"] = 24, ["keepAspectRatio"] = false, ["animation"] = { ["start"] = { ["duration_type"] = "seconds", ["type"] = "none", }, ["main"] = { ["duration_type"] = "seconds", ["type"] = "none", }, ["finish"] = { ["duration_type"] = "seconds", ["type"] = "none", }, }}`; const jsonString = luaStr.replace(/\] = /g, ']: '); const jsonObj = eval(`(${jsonString})`); console.log(jsonObj);

Answer 4

Added array converting

 const luaStr = `{ ["glow"] = true, ["xOffset"] = -287.99981689453, ["yOffset"] = -227.55575561523, ["anchorPoint"] = "CENTER", ["cooldownSwipe"] = true, ["customTextUpdate"] = "update", ["cooldownEdge"] = false, ["icon"] = true, ["useglowColor"] = false, ["internalVersion"] = 24, ["keepAspectRatio"] = false, ["animation"] = { ["start"] = { ["duration_type"] = "seconds", ["type"] = "none", }, ["main"] = { ["duration_type"] = "seconds", ["type"] = "none", }, ["finish"] = { ["duration_type"] = "seconds", ["type"] = "none", }, ["test1"] = { "test1" }, ["test2"] = { "test1", "test2" }, ["test3"] = { "test1", "test2", "test2" }, }}`; const result = luaStr.replace(/\[|\]/g, '') // remove the brackets.replace(/=/g, ':') // replace the = with: .replace(/(\,)(?=\s*})/g, '') // remove trailing commas.replace(/\{\s*(\"[^".]*\"(\s*\,\s*\"[^".]*\")*)\s*\}/g, '[$1]') // to array console.log (result) const parsed = JSON.parse(result); console.log(parsed);