[Lua][Question]How to convert "0.0" into "0"?

str = string.match(tostring(myNumber), "(%-?%d+)%.")

Frederikam, on 29 December 2012 - 04:41 AM said:

This question is simple, I want to know how to convert for example "6.0" into "6". What happens is that when I try to save an int it adds for example ".0" to the int.

1lann, on 29 December 2012 - 04:46 AM said:

Frederikam, on 29 December 2012 - 04:41 AM said:

This question is simple, I want to know how to convert for example "6.0" into "6". What happens is that when I try to save an int it adds for example ".0" to the int.

When I tried setting a variable to 6.0, then printed the variable, it returned 6. So I don't see your problem here, lua does this automatically for numbers.

Unless you're trying to do this with a string, which Lyqyd has show how to do such a thing.

Lyqyd, on 29 December 2012 - 04:45 AM said:

str = string.match(tostring(myNumber), "(%-?%d+)%.")

See string manipulation and its subsection on patterns in the Lua reference manual.

Lyqyd, on 29 December 2012 - 04:54 AM said:

Let's see the code, please. I think a simpler solution is possible.

curFacing = 0
curX = 0
curY = 0
curZ = 0
curFacingString = UNKNOWN
function fell()
    if turtle.dig() then
	    turtle.dig()
	    turtle.forward()
	    turtle.select(2)
	    turtle.digUp()
	    turtle.up()
	    while turtle.compareUp() == true and turtle.digUp() do
		    turtle.digUp()
		    turtle.up()
	    end
	    while turtle.down() == true do
		   if turtle.getFuelLevel() == 0 then
			   turtle.select(1)
			   turtle.refuel(1)
			   turtle.select(2)
		    end
		   turtle.down()
	    end
	    print("Finished tree!")
    end
end
function forward()
    turtle.forward()
    if curFacing == 0 then
	    curZ = curZ + 1
    elseif curFacing == 1 then
	    curX = CurX - 1
    elseif curFacing == 2 then
	    curZ = curZ - 1
    else
	    curX = curX + 1
    end
    saveData()
end
function left()
    turtle.turnLeft()
    if curFacing == 0 then
	    curFacing = 3
    else
	    curFacing = curFacing - 1
    end
    saveData()
end
function right()
    turtle.turnRight()
    if curFacing == 3 then
	    curFacing = 0
    else
	    curFacing = curFacing + 1
    end
    saveData()
end
function up()
    turtle.up()
    curY = curY + 1
    saveData()
end
function down()
    turtle.down()
    curY = curY - 1
    saveData()
end
function saveData()
    print("saving!")
    local file = fs.open("/data", "w")
    file.writeLine(curX)
    file.writeLine(curY)
    file.writeLine(curZ)
    file.writeLine(curFacing)
    file.close()
end
function loadData()
    local file = fs.open("/data", "r")
    curX = file.readLine()
    curY = file.readLine()
    curZ = file.readLine()
    curFacing = file.readLine()
    print("Save data loaded!")
    if curFacing == 0 then
	    curFacingString = south
    elseif curFacing == 1 then
	    curFacingString = west
    elseif curFacing == 2 then
	    curFacingString = south
    elseif curFacing == 3 then
	    curFacingString = east
    else
	    print("Facing direction unknown!")
    end
    --print("I am at X="..curX..", Y="..curY..", Z="..curZ.."and I am facing "..curFacingString..".")
end
-- Main function
if fs.exists("/data") then
    loadData()
else
    print("No data found")
end
print(curX)
print(curY)
print(curZ)
print(curFacing)
if turtle.getFuelLevel

Lyqyd, on 29 December 2012 - 05:02 AM said:

You need to tonumber() the values when you load them from the file. Here is an example line to show you what I mean:

curX = tonumber(file.readLine())

They are loaded as strings from the file, so to use them correctly as numbers, you must use tonumber() when loading them.

    local file = fs.open("/data", "r")
    curX = tonumber(file.readLine())
    curY = tonumber(file.readLine())
    curZ = tonumber(file.readLine())
    curFacing = tonumber(file.readLine())
    print("Save data loaded!")
    if curFacing == 0 then
	    curFacingString = south
    elseif curFacing == 1 then
	    curFacingString = west
    elseif curFacing == 2 then
	    curFacingString = south
    elseif curFacing == 3 then
	    curFacingString = east
    else
	    print("Facing direction unknown!")

curFacing = 0
curX = 0
curY = 0
curZ = 0
curFacingString = UNKNOWN
function fell()
    if turtle.dig() then
	    turtle.dig()
	    turtle.forward()
	    turtle.digUp()
	    turtle.up()
	    while turtle.compareUp() == true and turtle.digUp() do
		    turtle.digUp()
		    turtle.up()
	    end
	    while turtle.down() == true do
		    turtle.down()
	    end
    end
end
function forward()
    turtle.forward()
    if curFacing == 0 then
	    curZ = curZ + 1
    elseif curFacing == 1 then
	    curX = CurX - 1
    elseif curFacing == 2 then
	    curZ = curZ - 1
    else
	    curX = curX + 1
    end
    saveData()
end
function left()
    turtle.turnLeft()
    if curFacing == 0 then
	    curFacing = 3
    else
	    curFacing = curFacing - 1
    end
    saveData()
end
function right()
    turtle.turnRight()
    if curFacing == 3 then
	    curFacing = 0
    else
	    curFacing = curFacing + 1
    end
    saveData()
end
function up()
    turtle.up()
    curY = curY + 1
    saveData()
end
function down()
    turtle.down()
    curY = curY - 1
    saveData()
end
function saveData()
    local file = fs.open("/data", "w")
    file.writeLine(curX)
    file.writeLine(curY)
    file.writeLine(curZ)
    file.writeLine(curFacing)
    file.close()
end
function loadData()
    local file = fs.open("/data", "r")
    curX = tonumber(file.readLine())
    curY = tonumber(file.readLine())
    curZ = tonumber(file.readLine())
    curFacing = tonumber(file.readLine())
    print("Save data loaded!")
end
function checkTrees()
    for i=1, 4, 1 do
	    forward()
    end
    left()
    for i=1, 3, 1 do
	    forward()
    end
    if turtle.compare() then
	    fell()
	    left()
	    forward()
	    right()
	    right()
	    turtle.select(2)
	    turtle.place()
	    turtle.select(1)
	    right()
	    right()
    else
	    left()
	    forward()
	    right()
	    forward()
	    left()
    end
end
-- Main function
if rs.getInput("right") then
    os.terminate()
end
turtle.select(1)
if fs.exists("/data") then
    loadData()
else
    print("No data found")
end
print(curX.." "..curY.." "..curZ.." "..curFacing)
if turtle.getFuelLevel() >= 200 then
    checkTrees()
end

Lyqyd, on 29 December 2012 - 06:22 AM said:

Do you still have the testing prints in your fixed code (the ones below that print curX, curY, curZ, and curFacing)? If so, what does it print for curFacing when it says direction is unknown?

Lyqyd, on 29 December 2012 - 07:39 AM said:

Do not create a new post for additional questions about a single piece of code. I will be merging these topics when I get home tonight.

curX = CurX - 1 

remiX, on 29 December 2012 - 09:42 AM said:

curX = CurX - 1 

changed that C to lowercase c

ChunLing, on 30 December 2012 - 12:25 AM said:

Please make an effort to fix each new problem you encounter before referring it to the forum. While some people take a certain pleasure in fixing errors you haven't even noticed yet, this is not the actual point of this forum.