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Top Forums Shell Programming and Scripting Find character and Replace character for given position Post 302739079 by RudiC on Monday 3rd of December 2012 12:35:52 PM
Old 12-03-2012
Quote:
Originally Posted by Sara183
. . .
And i need to find if '-' present in that string B090712-0013001, then replace the whole string with "O".
This is NOT what you requested in the first place, where you requested a char-by-char replacement of chars in the region 284 - 298. Your sample file has 192 and 176 char lines.
Based on your initial question, in which you limited the solution to using sed, I'd proposed to try this:
Code:
sed -nr 's/^(.{283})/\1\n/; P;         # insert a <newline> after 283 char and print up to it
         s/^.{284}//; h                # remove first 283 chars plus <nl> and put remainder on hold
         s/^(.{15}).*/\1\n/;y/-/O/;P;  # prepare 15 chars (by dropping rest) and transliterate "-" to "O", print
         g                             # get back hold space
         s/^.{15}//;p                  # remove first 15 chars; then print
        ' file |
sed 'N;N;s/\n//g'                      # remove the two <newline> chars inserted and printed before

Quote:
Did anyone know the how to achieve this?
Bumping up threads within few hours DOES NOT REALLY help.
 

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XmTextFindStringWcs(3X) 												   XmTextFindStringWcs(3X)

NAME
XmTextFindStringWcs - A Text function that finds the beginning position of a wide character text string SYNOPSIS
#include <Xm/Text.h> Boolean XmTextFindStringWcs (widget, start, wcstring, direction, position) Widget widget; XmTextPosition start; wchar_t *wcstring; XmTextDirection direction; XmTextPosition *position; DESCRIPTION
XmTextFindStringWcs locates the beginning position of a specified wide character text string. This routine searches forward or backward for the first occurrence of the string, starting from the given start position. If a match is found, the function returns the position of the first character of the string in position. Specifies the Text widget ID. Specifies the character position from which the search pro- ceeds. This is an integer number of characters from the beginning of the text buffer. The first character position is 0. Specifies the wide character search string. Indicates the search direction. It is relative to the primary direction of the text. The possible values are: The search proceeds toward the end of the buffer. The search proceeds toward the beginning of the buffer. Specifies the pointer in which the first character position of the string match is returned. This is an integer number of characters from the beginning of the buf- fer. The first character position is 0. If the function returns False, this value is undefined. For a complete definition of Text and its associated resources, see XmText(3X). RETURN VALUE
Returns True if a string match is found; otherwise, returns False. SEE ALSO
XmText(3X), XmTextFindString(3X) XmTextFindStringWcs(3X)
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