how to print document?

YUGATUG, on 05 April 2015 - 04:31 PM said:

How do you print the contents of a text file?

local f = fs.open("file", "r")
local contents = f.readAll()
f.close()
print(contents)

--# Write to file
myDocument = {"yolo"}
myFile = fs.open("myFile.txt", "w")
myFile.writeLine(myDocument[1])
myFile.close()

--# Read file
myFile = fs.open("myFile.txt", "r")
contents = myFile.readAll()
myFile.close()

--# Print file
print(contents)

HPWebcamAble, on 05 April 2015 - 08:00 PM said:

The writing to the file is good, reading, not so much.


This should work:

--# Write to file
myDocument = {"yolo"}
myFile = fs.open("myFile.txt", "w")
myFile.writeLine(myDocument[1])
myFile.close()

--# Read file
myFile = fs.open("myFile.txt", "r")
contents = myFile.readAll()
myFile.close()

--# Print file
print(contents)

CrazedProgrammer, on 05 April 2015 - 08:00 PM said:

You closed the file before reading it.

TechedZombie, on 05 April 2015 - 08:22 PM said:

HPWebcamAble, on 05 April 2015 - 08:00 PM said:

The writing to the file is good, reading, not so much.


This should work:

--# Write to file
myDocument = {"yolo"}
myFile = fs.open("myFile.txt", "w")
myFile.writeLine(myDocument[1])
myFile.close()

--# Read file
myFile = fs.open("myFile.txt", "r")
contents = myFile.readAll()
myFile.close()

--# Print file
print(contents)

That is what he has for the read already…

CrazedProgrammer, on 05 April 2015 - 08:00 PM said:

You closed the file before reading it.

No he didn't

TechedZombie, on 05 April 2015 - 08:22 PM said:

That is what he has for the read already…

myFile, myDocument = fs.open("myDocument", "r"), {}--allows document to be written, i don't know what ", {}" does but someone on the forums said to include it
table.insert(myDocument)--not exactly sure what this does
myDocument.close()--done reading

myFile = fs.open("myDocument", "r")
contents = myDocument.readAll()
print(contents)

contents = myDocument.readAll() --# myDocument is the table from above, not the file handle

temp = fs.open("example","a")
temp.writeLine("hello")
temp.close()
[code]

This would write to the end of the file.

print(args[2] .. " is already on the list")

YUGATUG, on 07 April 2015 - 12:15 AM said:

how do i open the file in append mode? do i use an "a" instead of a "w" or a "r"?

i = 1 --#set i to 1 immediately, overwriting any previous declaration of i
contents = " " --#make a global variable (FYI this overwrites any previous vars too) (why?)
myFile = " " --#   ^
myDocument = " " --# ^^
argstringUse = {" "} --#define a new table, overwriting any previous tables
args = {...} --#globally declare a table of arguments
if args[1] == "add" then --#if they said add then
  myFile = fs.open("myFile.txt", "r") --#open your file to a global variable
  contents = myFile.readAll() --#read the contents, putting them in another global variable
  myFile.close() --#close it
  argstringUse[i] = args[2] --#set the first key in your fresh table to the second argument
  if contents == argstringUse[1] then --#if the entire previous document is equal to what they entered
    print(args[2] .. " is already on the list") --#tell them it's on a list
  else
    myFile = fs.open("myFile.txt", "w") --#open the document in write mode
    myFile.write(args[2]) --#overwrite everything with the second argument
    myFile.close() --#close the file
    i = i + 1 --#uselessly add 1 to i, since we never loop again
  end
end

local contents, tArgs = {}, {...}
if fs.exists( "myFile" ) then
  local file = fs.open( "myFile", "r" )
  for line in file.readLine do
    contents[ line ] = true
  end
end

if tArgs[ 1 ] == "add" then
  if contents[ tArgs[  2 ] ] then
    print( tArgs[ 2 ] .. " is already on the list" )
  else
    local file = fs.open( "myFile", "a" )
    file.writeLine( tArgs[ 2 ] )
    file.close()
  end
end

local contents, tArgs = {}, {...} --#contents is a new table, tArgs is the arguments
if fs.exists( "myFile" ) then --#if the file exists
  local file = fs.open( "myFile", "r" ) --#open it
  for line in file.readLine do --#iterate through the lines of the file
    contents[ line ] = true --#say the line was "Hello World", this would make contents[ "Hello World" ] = true
  end
end

if tArgs[ 1 ] == "add" then --#if they said add
  if contents[ tArgs[  2 ] ] then --#if the contents table contains the line
    print( tArgs[ 2 ] .. " is already on the list" ) --#print it's already on the list
  else
    local file = fs.open( "myFile", "a" ) --#open in append mode (doesn't overwrite)
    file.writeLine( tArgs[ 2 ] ) --#write the new line at the end of the file
    file.close() --#close it
  end
elseif tArgs[ 1 ] == "list" then
  for k, v in pairs( contents ) do --#iterate through the contents
    print( k ) --#print the key (note: line 5 adds them as keys, not values)
  end
end

local i = 1 --#this gives the same functionality as "for i = 1, 3 do print( i ) end", but shows how break works.
while true do
  print( i )
  if i == 3 then
    break
  end
  i = i + 1
end

elseif tArgs[ 1 ] == "delete" then
  if contents[ tArgs[ 2 ] ] then --#if it is there
    local file = fs.open( "myFile", "w" ) --#open the file
    for k, v in pairs( contents ) do --#iterate
      if tArgs[ 2 ] ~= k then --#if it's not the line to delete
        file.writeLine( k ) --#write it down
      end
    end
  else
    print( tArgs[ 2 ] .. " was never on the list." )
  end
end

YUGATUG, on 08 April 2015 - 10:14 PM said:

also, problem: if there are too many strings, the program will not display all of the strings. I wanted to have the user be able to use the up and down arrows to scroll up and down the list, then enter or space or some other special key to exit scroll mode, with text at the bottom of the screen constantly displaying "Hit [UP] and [DOWN] to scroll up and down the list, and hit space/enter to exit scroll mode." until the user exits scroll mode. I have no idea how i'd even begin to write that, can you help me out?

Lyqyd, on 11 April 2015 - 05:42 PM said:

Or just textutils.pagedTabulate(peripheral.getMethods("side")).

KingofGamesYami, on 11 April 2015 - 04:53 PM said:

What I said will do that.

 elseif tArgs[ 1 ] == "delete" then if contents[ tArgs[ 2 ] ] then --#if it is there local file = fs.open( "myFile", "w" ) --#open the file for k, v in pairs( contents ) do --#iterate if tArgs[ 2 ] ~= k then --#if it's not the line to delete file.writeLine( k ) --#write it down end end else print( tArgs[ 2 ] .. " was never on the list." ) end end 

YUGATUG, on 12 April 2015 - 05:35 PM said:

if i understand you correctly, that's saying that if <string> does not match k, then the program will write in k (k is the current string the program is comparing against, right?). if it does, the program will print(<string> .. "was never on the list.") , which means that the <string> in the document will never be deleted. Am i understanding your code correctly?

else

if contents[ tArgs[ 2 ] ] then --#if it is there

HPWebcamAble, on 12 April 2015 - 06:02 PM said:

YUGATUG, on 12 April 2015 - 05:35 PM said:

if i understand you correctly, that's saying that if <string> does not match k, then the program will write in k (k is the current string the program is comparing against, right?). if it does, the program will print(<string> .. "was never on the list.") , which means that the <string> in the document will never be deleted. Am i understanding your code correctly?

Actually, the idea is that it will open the file that stores them, and rewrite every line, EXCEPT the one you specify to delete.

Remember that when opening files in "w" mode, it deletes the content of the file before you write anything

YUGATUG, on 14 April 2015 - 11:17 PM said:

make the program as i describe

HPWebcamAble, on 15 April 2015 - 12:46 AM said:

YUGATUG, on 14 April 2015 - 11:17 PM said:

make the program as i describe

I don't think this thread actually has a full description of the program. Maybe you should lay out how it should work in one post

You can also try posting in the General section so that more people see it, although I'm not sure if the Admins will let you do the gift card thing