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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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XmTextFieldPosToXY(library call)										  XmTextFieldPosToXY(library call)

NAME
XmTextFieldPosToXY -- A TextField function that accesses the x and y position of a character position SYNOPSIS
#include <Xm/TextF.h> Boolean XmTextFieldPosToXY( Widget widget, XmTextPosition position, Position *x, Position *y); DESCRIPTION
XmTextFieldPosToXY accesses the x and y position, relative to the upper left corner of the TextField widget, of a given character position in the text buffer. widget Specifies the TextField widget ID position Specifies the character position in the text for which the x and y position is accessed. This is an integer number of characters from the beginning of the buffer. The first character position is 0. x Specifies the pointer in which the x position is returned. The returned position is the distance from the left side of the wid- get to the left border of the character. This value is meaningful only if the function returns True. y Specifies the pointer in which the y position is returned. The returned position is the distance from the top of the widget to the character's baseline. This value is meaningful only if the function returns True. For a complete definition of TextField and its associated resources, see XmTextField(3). RETURN
This function returns True if the character position is displayed in the TextField widget; otherwise, it returns False, and no x or y value is returned. RELATED
XmTextField(3). XmTextFieldPosToXY(library call)
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