我在ComputerCraft中有一个乌龟程序，该程序打算作为存储单元。我输入了一个项目，它应该读取一个文件以查找放置该项目的位置。如果有新项目，它将信息添加到文件中。 当我这样做
blockTypes = {}
local file = fs.open(blockTable","r")
line = file.readAll()
table.insert(blockTypes,line)
file.close()
信息以字符串形式输入。这意味着我不能做
print(blockTypes[1][1])
并接收通常位于该位置的值。
这是我的代码：
blockAmount = 3
highestVal = {2,0,5}
blockTypes = {}
function addBlock()
local file = fs.open("blockTable", "a")
file.write(name)
file.write(" = {")
file.write(highestVal[1])
file.write(",")
file.write(highestVal[2])
file.write(",")
file.write(highestVal[3])
file.writeLine("};")
file.close()
end
function getBlock()
local file = fs.open("blockTable","r")
line = file.readAll()
table.insert(blockTypes,line)
file.close()
end
--This was used to test before implementing the new file system that I am trying to get to work
blockTypesOld = {
log = {2.0,0,1};
dirt = {2,0,2};
cobblestone = {2,0,3};
iron_ingot = {2,0,4};
planks = {2,0,5};
}
pos = {0,0,0}
looking = 0
function fuel()
if turtle.getFuelLevel() < 20 then
turtle.select(16)
turtle.refuel(1)
end
end
function left()
turtle.turnLeft()
looking = looking - 1
if looking < 0 then
looking = 3
end
end
function right()
turtle.turnRight()
looking = looking + 1
if looking > 3 then
looking = 0
end
end
function forward()
fuel()
if turtle.forward() then
if looking == 0 then
pos[1] = pos[1] - 1
elseif looking == 1 then
pos[3] = pos[3] - 1
elseif looking == 2 then
pos[1] = pos[1] + 1
elseif looking == 3 then
pos[3] = pos[3] + 1
else
end
end
end
function up()
fuel()
turtle.up()
pos[2] = pos[2] + 1
end
function down()
fuel()
turtle.down()
pos[2] = pos[2] - 1
end
function goHome()
while pos[3] > 0 do
while looking > 1 do
left()
end
forward()
end
while pos[2] > 0 do
down()
end
while pos[1] > 0 do
while looking > 0 do
left()
end
forward()
end
end
function goTo(a,b,c)
goHome()
while looking < 2 or looking > 2 do
right()
end
for i = pos[1],a do
forward()
end
while looking > 3 or looking < 3 do
right()
end
for i = pos[3],c do
forward()
end
for i = pos[2],b do
up()
end
while looking < 2 or looking > 2 do
left()
end
end
while true do
turtle.select(15)
while not turtle.suck() do
sleep(1)
end
itemDetails = turtle.getItemDetail()
--Finding what mod item is from and removing corresponding labels--
--EX: "minecraft:log" becomes "log"
if itemDetails.name:match("^ae2stuff:(.+)$") then
name = itemDetails.name:match("^ae2stuff:(.+)$")
elseif itemDetails.name:match("^minecraft:(.+)$") then
name = itemDetails.name:match("^minecraft:(.+)$")
elseif itemDetails.name:match("^appliedenergistics2:(.+)$") then
name = itemDetails.name:match("^appliedenergistics2:(.+)$")
elseif itemDetails.name:match("^buildcraftbuilders:(.+)$") then
name = itemDetails.name:match("^buildcraftbuilders:(.+)$")
elseif itemDetails.name:match("^forge:(.+)$") then
name = itemDetails.name:match("^forge:(.+)$")
elseif itemDetails.name:match("^buildcraftenergy:(.+)$") then
name = itemDetails.name:match("^buildcraftenergy:(.+)$")
elseif itemDetails.name:match("^buildcraftfactory:(.+)$") then
name = itemDetails.name:match("^buildcraftfactory:(.+)$")
elseif itemDetails.name:match("^buildcraftsilicon:(.+)$") then
name = itemDetails.name:match("^buildcraftsilicon:(.+)$")
elseif itemDetails.name:match("^buildcrafttransport:(.+)$") then
name = itemDetails.name:match("^buildcrafttransport:(.+)$")
elseif itemDetails.name:match("^buildcraftcore:(.+)$") then
name = itemDetails.name:match("^buildcraftcore:(.+)$")
elseif itemDetails.name:match("^buildcraftlib:(.+)$") then
name = itemDetails.name:match("^buildcraftlib:(.+)$")
elseif itemDetails.name:match("^computercraft:(.+)$") then
name = itemDetails.name:match("^computercraft:(.+)$")
elseif itemDetails.name:match("^enderstorage:(.+)$") then
name = itemDetails.name:match("^enderstorage:(.+)$")
elseif itemDetails.name:match("^extracells:(.+)$") then
name = itemDetails.name:match("^extracells:(.+)$")
elseif itemDetails.name:match("^thermaldynamics:(.+)$") then
name = itemDetails.name:match("^thermaldynamics:(.+)$")
elseif itemDetails.name:match("^thermalexpansion:(.+)$") then
name = itemDetails.name:match("^thermalexpansion:(.+)$")
elseif itemDetails.name:match("^thermalfoundation:(.+)$") then
name = itemDetails.name:match("^thermalfoundation:(.+)$")
elseif itemDetails.name:match("^tconstruct:(.+)$") then
name = itemDetails.name:match("^tconstruct:(.+)$")
elseif itemDetails.name:match("^webdisplays:(.+)$") then
name = itemDetails.name:match("^webdisplays:(.+)$")
elseif itemDetails.name:match("^ironchest:(.+)$") then
name = itemDetails.name:match("^ironchest:(.+)$")
else
print("ERROR MOD NOT FOUND")
end
getBlock()
local elem = blockTypes[name]
--Gets fuel from fuel chest
right()
turtle.select(16)
turtle.suck(5)
turtle.select(15)
if elem then
--If the item does exist, the turtle goes to it's chest and places it in the chest
goTo(elem[1]-1, elem[2]-1, elem[3]-1)
turtle.select(15)
turtle.drop()
goHome()
right()
turtle.select(16)
turtle.drop()
turtle.select(15)
left()
else
--Creates information for new item--
addBlock()
blockAmount = blockAmount + 1
highestVal[3] = highestVal[3] + 1
if highestVal[3] > 5 then
highestVal[3] = 1
highestVal[2] = highestVal[2] + 1
end
if highestVal[2] > 4 then
highestVal[2] = 0
highestVal[1] = highestVal[1] + 2
end
blockTypes[blockAmount] = name
blockTypes[name] = {highestVal[1],highestVal[2],highestVal[3]}
local elem = blockTypes[name]
left()
turtle.select(15)
turtle.drop()
right()
turtle.select(16)
turtle.suck(2)
fuel()
turtle.drop()
goTo(1,-1,4)
--Crafts an Iron Chest for the New Item
for i = 1,3 do
turtle.select(i)
turtle.suck(1)
end
turtle.select(5)
turtle.suck(1)
turtle.select(7)
turtle.suck(1)
for i = 9,11 do
turtle.select(i)
turtle.suck(1)
end
turtle.select(6)
turtle.craft()
goTo(1,-1,3)
for i = 1,3 do
turtle.select(i)
turtle.suck(1)
end
turtle.select(5)
turtle.suck(1)
turtle.select(7)
turtle.suck(1)
for i = 9,11 do
turtle.select(i)
turtle.suck(1)
end
turtle.select(1)
turtle.craft()
goHome()
right()
turtle.select(16)
turtle.suck(5)
goTo(elem[1]-1, elem[2]-1, elem[3]-1)
turtle.select(1)
turtle.place()
goHome()
end
end
包含项目坐标的文件称为blockTable，由以下内容组成：
--blockName = {xCoord,yCoord,zCoord};--
oak_stairs = {2.0,0.0,5.0};
iron_ingot = {2.0,0.0,4.0};
turtle = {2.0,0.0,5.0};
当我放入新物品时，它会注册该物品，制作一个箱子并将其放入。当我将同一物品放入时，它会直接进入箱子而无需制作新物品。但是，当我重新启动乌龟并放入相同的物品时，它会创建另一个新的箱子并尝试将其放置在新物品上。我希望它即使重新启动后也能够保留其信息。我已经为此程序苦苦了一段时间了，任何帮助将不胜感激。谢谢！
答案 0 :(得分：2)
每次添加新块时读取/写入整个文件似乎有些混乱，特别是如果您考虑到可能在写入新文件的过程中重启乌龟并最终导致一半数据丢失的话。 / p>
您确实有一个文件系统，那么为什么不使用它呢？创建一个目录并为每个块名称编写一个新文件，然后将坐标保存在其中。这样一来，您就可以为每种街区类型存储一个以上的箱子，以防您比使用龟类挖掘地图大块时要富裕的情况要早得多。
我只是意识到我实际上并没有回答这个问题，所以去了：
拥有文件file时，您可以轻松地使用file.readLine()读取一行。这将返回读取为字符串的行，或者返回nil（如果您位于文件末尾）。假设您只在块名称后写了三个以空格分隔的坐标，然后可以将它们解析为一个表，如下所示：
local file = fs.open('chests')
local chests = {}
while true do
local line = file.readLine()
if line then
local name, x, y, z = line:match("(%a+) ([%d.+-]+) ([%d.+-]+) ([%d.+-]+)")
chests[name] = {
tonumber(x),
tonumber(y),
tonumber(z)
}
else
break
end
end
将所有内容包装在一个函数中以使其更加整洁。
旁注：
Computercraft在处理文件方面有些不便。在常规的Lua中，我会这样做：
local function map(f, elem, ...)
if elem then return f(elem), map(f, ...) end
end
local function readchests(file)
local res = {}
for line in io.open(file):lines() do
local name, x, y, z = line:match("(%a+)"..(" [%d.-+]+"):rep(3))
res[name]={map(tonumber, x, y, z)}
end
return res
end
如果要保持将数据存储为有效的Lua代码的格式，则可以使用file.readAll()读取整个文件，在开头添加"return {"，在结尾添加"}"，然后然后加载并执行该字符串。总的来说，我不建议这样做。如果整个文件只是可以读取和运行的有效Lua代码，那就更好了。
答案 1 :(得分：0)
尽管不建议每次如DarkWiiPlayer所述将文件添加到新块时都读取文件。
要回答您的问题，您可以读入表并使用loadstring从字符串中执行代码。
要使用提供的文件中的现有字符串来执行此操作，还需要做一些额外的工作。 可以通过调整文件中的字符串来删除这些多余的工作。
blockTypes = {}
line = "oak_stairs = {2.0,0.0,5.0};"
table_name = line:match("[%a_]+%s")
do_line = assert(loadstring('local ' .. line .. ' return ' .. table_name))
table = do_line();
table.insert(blockTypes,table)
在这里，我们使用match获取正在加载的表的名称。
为loadstring创建一个字符串，该字符串生成并返回表。
执行加载的字符串，然后将其插入blockTypes。
或者，您可以将要保存的文件调整为充当模块。
local blocktypes = {
oak_stairs = {2.0,0.0,5.0},
iron_ingot = {2.0,0.0,4.0},
turtle = {2.0,0.0,5.0},
}
return blockTypes
然后您将要加载数据：
blockTypes = require("blockTable")