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Top Forums UNIX for Beginners Questions & Answers Question on bash command line Post 303020967 by kraljic on Wednesday 1st of August 2018 10:05:39 AM
Old 08-01-2018
Question on bash command line

OS : RHEL / Oracle Linux 6.8

In bash shell, how can I replace a character under the cursor with another character ?

In the below example , after I typed the following line, I realized that I meant 7013 and not 2013. So I move the cursor to the left and keep it on top of 2 (of 2013) and I want to replace 2 with 7. How can I do that ?

$ echo hello world 2013

This question is not about replacing characters within vi/vim/emacs

A video example (for more clarity)
In the below video, how is this guy changing 2010 to 2011 instantly ? He also changes 2011 to 2012 , ... etc . I tried googling and I couldn't find anything on this. Hence posting it here.

Oracle Performance Tuning - Loading Data - 03 Using manual parallelism and changing initrans - YouTube

Last edited by kraljic; 08-01-2018 at 11:13 AM..
 

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curs_alecompat(3CURSES) 				     Curses Library Functions					   curs_alecompat(3CURSES)

NAME
curs_alecompat, movenextch, wmovenextch, moveprevch, wmoveprevch, adjcurspos, wadjcurspos - these functions are added to ALE curses library for moving the cursor by character. SYNOPSIS
cc [ flag ... ] file ... -lcurses [ library .. ] #include <curses.h> int movenextch(void); int wmovenextch(WINDOW *win); int moveprevch(void); int wmoveprevch(WINDOW *win); int adjcurspos(void); int wadjcurspos(WINDOW *win); DESCRIPTION
movenextch() and wmovenextch() move the cursor to the next character to the right. If the next character is a multicolumn character, the cursor is positioned on the first (left-most) column of that character. The new cursor position will be on the next character, even if the cursor was originally positioned on the left-most column of a multicolumn character. Note that the simple cursor increment (++x) does not guarantee movement to the next character, if the cursor was originally positioned on a multicolumn character. getyx(3CURSES) can be used to find the new position. moveprevc() and wmoveprevch() routines are the opposite of movenextch() and wmovenextch(), moving the cursor to the left-most column of the previous character. adjcurspos() and wadjcurspos() move the cursor to the first(left-most) column of the multicolumn character that the cursor is presently on. If the cursor is already on the first column, or if the cursor is on a single-column character, these routines will have no effect. RETURN VALUE
All routines return the integer ERR upon failure and an integer value other than ERR upon successful completion. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |Unsafe | +-----------------------------+-----------------------------+ SEE ALSO
curses(3CURSES), getyx(3CURSES), attributes(5) NOTES
The header file <curses.h> automatically includes the header files <stdio.h> , <unctrl.h> and <widec.h>. Note that movenextch(), moveprevch(), and adjcurspos() may be macros. SunOS 5.11 31 Dec 1996 curs_alecompat(3CURSES)
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