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Top Forums UNIX for Dummies Questions & Answers replacing 1 character with many : tr Post 302255781 by hkansal on Friday 7th of November 2008 05:23:36 AM
Old 11-07-2008
Bug there

Quote:
I think you should change the colour!! :-)
Done Smilie

Quote:
you have extra spaces in your sed script after the = which may prevent it matching and may also affect the parameters being set correctly, depending on what the file is used for. Same when you add a new attribute to the file.
The space is required because in the file the attribute value pairs are kept as:
attrib1= value
attrib2= value

Still I would try out w/o the space and ll see if it works too.

Quote:
use a temporary file somewhere else, e.g. in /tmp, maybe using mktemp, or by adding the PID to make it unique, e.g. /tmp/htmp.$$, and remove it after use (if the users says no to "save changes").
I ll try to incorporate this.

thanks for the inputs Smilie

Quote:
You might try sed 's/\//\\\//'
Tried this but it did not work Smilie

Quote:
actually you also need to add a g to the end
[CODE]
sed "s^$attrib= .*^$attrib= $value^g" $file > htmp.txt # Store result in htmp.txt
[CODE]
I hope you are talking about this. Actually, I needed to have '\/' replacing '/' in $value. The variable wasn't being read appropriately. I am still unsure of the reason.

Thank You.

Regards

Last edited by hkansal; 11-07-2008 at 02:23 PM..
 

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paste(1)						      General Commands Manual							  paste(1)

Name
       paste - merge file data

Syntax
       paste file1 file2...
       paste -dlist file1 file2...
       paste -s [-dlist] file1 file2...

Description
       In  the	first  two forms, concatenates corresponding lines of the given input files file1, file2, etc.	It treats each file as a column or
       columns of a table and pastes them together horizontally (parallel merging).

       In the last form, the command combines subsequent lines of the input file (serial merging).

       In all cases, lines are glued together with the tab character, or with characters from an optionally specified  list.   Output  is  to  the
       standard output, so it can be used as the start of a pipe, or as a filter, if - is used in place of a file name.

Options
       -       Used in place of any file name, to read a line from the standard input.	(There is no prompting).

       -dlist  Replaces  characters  of  all but last file with nontabs characters (default tab).  One or more characters immediately following -d
	       replace the default tab as the line concatenation character.  The list is used circularly, i. e. when exhausted, it is reused.	In
	       parallel  merging  (i. e. no -s option), the lines from the last file are always terminated with a new-line character, not from the
	       list.  The list may contain the special escape sequences: 
 (new-line), 	 (tab), \ (backslash), and  (empty string, not a null
	       character).   Quoting  may  be  necessary,  if characters have special meaning to the shell (for example, to get one backslash, use
	       -d"\\" ).
	       Without this option, the new-line characters of each but the last file (or last line in case of the -s option) are  replaced  by  a
	       tab character.  This option allows replacing the tab character by one or more alternate characters (see below).

       -s      Merges  subsequent  lines  rather  than	one  from  each input file.  Use tab for concatenation, unless a list is specified with -d
	       option.	Regardless of the list, the very last character of the file is forced to be a new-line.

Examples
       ls | paste -d" " -
       list directory in one column
       ls | paste - - - -
       list directory in four columns
       paste -s -d"	
" file
       combine pairs of lines into lines

Diagnostics
       line too long
		 Output lines are restricted to 511 characters.

       too many files
		 Except for -s option, no more than 12 input files may be specified.

See Also
       cut(1), grep(1), pr(1)

																	  paste(1)
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