Lua Programming Help Thread

i think it only has basic encryption in lua so i think it might have problems with that

I believe it doesn't work with WPA. Because I was able to use WLAN on lua player .20.

Hi,

I wanted to know if you were able to use a configuration file in LUA (i know in C it works) and how I could make one. Also I need some help with coroutines, what they are and do.

-sony_psp_player

Zitat:

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Zitat von sony psp player

Hi,

I wanted to know if you were able to use a configuration file in LUA (i know in C it works) and how I could make one. Also I need some help with coroutines, what they are and do.

-sony_psp_player

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you mean a text file meant for the user to change settings on the comp? yea you can do that.

Zitat:

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Zitat von EminentJonFrost

you mean a text file meant for the user to change settings on the comp? yea you can do that.

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Change on computer and from PSP so it can save the current state of the app.

Yes, you can use config files normally. I use'em all the time.

Just incluide your config file to you script.

cheers

I've looked on google now (may should have done before) and i found this: for line in file:lines.
They said this function will iterate all over the file but it doesn't. It returnes every second line.

Zitat:

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Zitat von sony psp player

I've looked on google now (may should have done before) and i found this: for line in file:lines.
They said this function will iterate all over the file but it doesn't. It returnes every second line.

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Ok, what are you trying to do? You don't need to read the file. If you want a config file, you can just set your variables into that file, and read the variables normally, as if it was an include. Know, if you wanna read specific bits of this file, you'll need to read it and iterate over the lines.

I don't have code samples here, but I can send'em to you later today.

Cheers

Zitat:

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Zitat von placo23

Ok, what are you trying to do? You don't need to read the file. If you want a config file, you can just set your variables into that file, and read the variables normally, as if it was an include. Know, if you wanna read specific bits of this file, you'll need to read it and iterate over the lines.

I don't have code samples here, but I can send'em to you later today.

Cheers

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No, I need to set the variables, too.

Zitat:

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Zitat von sony psp player

No, I need to set the variables, too.

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So it's easy. Just set whatever you need to set, and read'em :PC:

I think it's pretty straight forward. Unless I'm not getting your point here.

Do you wanna send me some piece of code telling exactly what you wanna do?

Cheers

Zitat:

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Zitat von placo23

So it's easy. Just set whatever you need to set, and read'em :PC:

I think it's pretty straight forward. Unless I'm not getting your point here.

Do you wanna send me some piece of code telling exactly what you wanna do?

Cheers

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Here is a detailed description of my problems:

I want to save some information about the user, the position... in a file called "config.txt" so here are my problems:

1. for line in file:lines doesn't iterate all over the file, it reads only every second line.
2. i don't know how to add a new line to the file

Here's an example:

Code:

---

file = io.open("myFile.txt", "r")
        if file then
                for line in file:lines() do
                        value = string.find(line, "userStatus=")
                       
                        if value then
                                return value
                        end
                end
        else
                screen:print(100,100,"Error opening file!",color)
        end

---

That should open the file and iterate over all the lines.

As per the append new line thingy, you can use

Code:

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io.open (filename, "a")

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Which will open the file in append mode.

Check the Lua Manual for more information

Hope it helps you.

Cheers

Here's an example:

Code:

---

file = io.open("myFile.txt", "r")
        if file then
                for line in file:lines() do
                        value = string.find(line, "userStatus=")
                       
                        if value then
                                return value
                        end
                end
        else
                screen:print(100,100,"Error opening file!",color)
        end

---

That should open the file and iterate over all the lines.

As per the append new line thingy, you can use

Code:

---

io.open (filename, "a")

---

Which will open the file in append mode.

Check the Lua Manual for more information

Hope it helps you.

Cheers

or you can use dofile

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Zitat von myschoo

or you can use dofile

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That will do too, but it ain't let him append to the file.

Cheers

Zitat:

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Zitat von placo23

Here's an example:

Code:

---

file = io.open("myFile.txt", "r")
        if file then
                for line in file:lines() do
                        value = string.find(line, "userStatus=")
                       
                        if value then
                                return value
                        end
                end
        else
                screen:print(100,100,"Error opening file!",color)
        end

---

That should open the file and iterate over all the lines.

As per the append new line thingy, you can use

Code:

---

io.open (filename, "a")

---

Which will open the file in append mode.

Check the Lua Manual for more information

Hope it helps you.

Cheers

---

Thanks for the example! The for line in file:lines returns only every second line still, but i can leave the lines that are not returned out. Thanks!

Zitat:

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Zitat von sony psp player

Thanks for the example! The for line in file:lines returns only every second line still, but i can leave the lines that are not returned out. Thanks!

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That's weird, 'cause I just tested here, and it returns me the whole file.

Well glad that you found out a way around to that.

Cheers

How would i go about pausing my main loop when start is pressed ?

Zitat:

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Zitat von placo23

Here's an example:

Code:

---

file = io.open("myFile.txt", "r")
    if file then
        for line in file:lines() do
            value = string.find(line, "userStatus=")
           
            if value then
                return value
            end
        end
    else
        screen:print(100,100,"Error opening file!",color)
    end

---

That should open the file and iterate over all the lines.

As per the append new line thingy, you can use

Code:

---

io.open (filename, "a")

---

Which will open the file in append mode.

Check the Lua Manual for more information

Hope it helps you.

Cheers

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Generally, you should check for error, rather than success. It makes for neater, and easier to read code.

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Zitat von eldiablov

How would i go about pausing my main loop when start is pressed ?

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Code:

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if pad:start() then
        oldpad = pad
        while true do
                pad = Controls.read()
                if pad:start() and not oldpad:start() then
                        break
                end
                oldpad = pad
        end
end

---

Zitat:

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Zitat von sony psp player

Code:

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if pad:start() then
        oldpad = pad
        while true do
                pad = Controls.read()
                if pad:start() and not oldpad:start() then
                        break
                end
                oldpad = pad
        end
end

---

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thats lovely thank you.

Zitat:

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Zitat von eldiablov

How would i go about pausing my main loop when start is pressed ?

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I'd rather do it like this:

Code:

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while not Controls.read():start() do
        screen:flip()
        screen.waitVblankStart()
end

---

That way you don't need to check with the IF every time

Cheers

sony_psp_player the pausing function works fine but it wont unpause :p

oh wait ill try placos way
-= Double Post =-
ok the pause function is working but how would i release a script from the memory ?

Zitat:

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Zitat von placo23

I'd rather do it like this:

Code:

---

while not Controls.read():start() do
        screen:flip()
        screen.waitVblankStart()
end

---

That way you don't need to check with the IF every time

Cheers

---

that wont work. you used a while loop, so he'll have to press start to update each frame. use an if statement instead:

Code:

---

if not pad:start() then
        screen:flip()
        screen.waitVblankStart()
end

---

or better yet, make a state system.

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Zitat von Grimfate126

that wont work. you used a while loop, so he'll have to press start to update each frame. use an if statement instead:

Code:

---

if not pad:start() then
        screen:flip()
        screen.waitVblankStart()
end

---

or better yet, make a state system.

---

Course it works. I use it all the time. Anyways.. that's just another way to do it.

Cheers

HHHHHHEEEEELLLPPPPPPPP

ok im no noob to lua but i cant get the keyboard intergration to work properly it chucks out an error every time i try to run it and i have just used sg57's example

here is the code

it is slightly modded but not so that it wouldnt work

any ideas maybee the example has an old function or something anyway

Code:

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White = Color.new(255, 255, 255)

Controls.IRkeyboardInit()

string = ""
shift = 0

oldpad = Controls.read()

while true do

pad = Controls.read()
screen:clear()

string = string .. Controls.IRKeyboardGetKey(shift)
screen:print(10, 10, string, White)

if
Controls.read():start()
then
break
end

screen.waitVblankStart()
screen.flip()

end

---

thanks in advance if you can help

I have no experience with IR keyboards, but wouldn't Controls.IRKeyboardGetKey (shift) be a boolean(true or false) value?

i'm guessing so Nielkie, seems logical

Zitat:

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if pad:start() then
end

if Controls.IRKeyboardGetKey (shift) then
end

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but i dont know really

please help

i need delete folder with some files but

Code:

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System.removeDirectory("ms0:/tmp")

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dont work :(

or delete all files from this folder - something like this:

Code:

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System.removeFile("ms0:/tmp/*.*")

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Zitat:

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Zitat von lps

please help

i need delete folder with some files but

Code:

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System.removeDirectory("ms0:/tmp")

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dont work :(

or delete all files from this folder - something like this:

Code:

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System.removeFile("ms0:/tmp/*.*")

---

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this would take quite a while to code something that operates in this way and would involve useing lots more cod than you are useing your best bet is to name each file that you want deleted r wait for about a month while i code it for you

Zitat:

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Zitat von FaT3oYCG

this would take quite a while to code something that operates in this way and would involve useing lots more cod than you are useing your best bet is to name each file that you want deleted r wait for about a month while i code it for you

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Or something like this:

Code:

---

local files = System.listDirectory("ms0:/tmp")

for i = 3, table.getn(files) do      -- 3 to avoid "." and ".."
        System.removeFile("ms0:/tmp/" .. files[i].name)
end

System.removeDirectory("ms0:/tmp")

---

Zitat:

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Zitat von FaT3oYCG

this would take quite a while to code something that operates in this way and would involve useing lots more cod than you are useing your best bet is to name each file that you want deleted r wait for about a month while i code it for you

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Zitat:

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Zitat von Nielkie

Or something like this:

Code:

---

local files = System.listDirectory("ms0:/tmp")

for i = 3, table.getn(files) - 2 do      -- 3 to avoid "." and ".."
    System.removeFile("ms0:/tmp/" .. files[i].name)
end

System.removeDirectory("ms0:/tmp")

---

---

I lol'd.

That was quick mate :ROFL:

Zitat:

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Zitat von Nielkie

Or something like this:

Code:

---

local files = System.listDirectory("ms0:/tmp")

for i = 3, table.getn(files) - 2 do      -- 3 to avoid "." and ".."
    System.removeFile("ms0:/tmp/" .. files[i].name)
end

System.removeDirectory("ms0:/tmp")

---

---

Er, '.' and '..' come first, so doing that would just skip the last two files in the directory instead of not including '.' and '..', no?

i was just writing up a thing about how you are wrong when i realized you were right lol.

the correct loop would read:

Code:

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for i = 3, table.getn(files)

---

the - 2 you had subtracts two from the loops limit, not from how many times the loop loops.

nice catch dysfunctional

Actually, I lied, his loop started at 3. His is correct.

yea but you still wouldn't need that -2 in there would you?

Yeah, you would, because if you didn't have it you would be going two items past the end of the array.

Zitat:

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Zitat von _dysfunctional

Yeah, you would, because if you didn't have it you would be going two items past the end of the array.

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Incorrect, table.getn will give you the max array index, so by subtracting 2, you are not removing the last 2 files. by starting at 3 you are skipping the first 2 items and you want it to run to the last index of the array.

Oh, I see. I thought something looked wrong.

P.S. #8000!