What my puzzle file!, How to remove special characters ?? Post: 302790197

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Top Forums UNIX for Advanced & Expert Users What my puzzle file!, How to remove special characters ?? Post 302790197 by bakunin on Friday 5th of April 2013 01:47:51 AM

04-05-2013

Registered User

Quote:

Originally Posted by arm_naja

-- After remove it by vi (I press x for 3 times because it have 3 char right?) --

Code:

root@MyHost /tmp> wc puzzle.txt
       1       0       1 puzzle.txt
root@MyHost /tmp> cat -v puzzle.txt

root@MyHost /tmp> ls -l puzzle.txt
-rw-r--r--    1 root     system            1 Mar 28 10:55 puzzle.txt
root@MyHost /tmp>

How I remove special chars???

The short answer is: you can't The single char "ls" shows is the End-of-File-character (literally a "^D") and it isn't possible with "vi" to delete it. In fact "vi" will even append such a EOF char to a file if it was missing.

Generate a file with "touch", it will have 0 characters. Now open this in "vi", write some text, delete it completely (this way "vi" thinks you have changed the file, do NOT use the undo-function) and save the file. You will notice that it has also 1 character in it - the EOF char.

I hope this helps.

bakunin

bakunin

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LEARN ABOUT DEBIAN

flsudoku

flsudoku(6)							   Games Manual 						       flsudoku(6)

NAME

       flsudoku - the fltk sudoku game

SYNOPSIS

       Sudoku  is a FLTK-based version of the game of Sudoku.  Sudoku (pronounced soo-dough-coo with the emphasis on the first syllable) is a sim-
       ple number-based puzzle/game played on a 9x9 grid that is divided into 3x3 subgrids. The goal is to enter a number from 1 to 9 in each cell
       so that each number appears only once in each column and row.

       At  the	start of a new game, Sudoku fills in a random selection of cells for you - the number of cells depends on the difficulty level you
       use. Click in any of the empty cells or use the arrow keys to highlight individual cells and press a number from 1 to  9  to  fill  in  the
       cell.  To  clear  a  cell, press 0, Delete, or Backspace. As you complete each subgrid, correct subgrids are highlighted in green. When you
       have successfully completed all subgrids, the entire puzzle is highlighted until you start a new game.

       As you work to complete the puzzle, you can display possible solutions inside each cell by holding the Shift key and pressing  each  number
       in turn. Repeat the process to remove individual numbers, or press a number without the Shift key to replace them with the actual number to
       use.

SEE ALSO

       fltk(3)
       FLTK Web Site, http://www.fltk.org/

AUTHOR

       Michael R Sweet.

15 January 2006 						    FLTK Sudoku 						       flsudoku(6)