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Top Forums Shell Programming and Scripting Swap two characters in a string Post 303000584 by Soham on Friday 14th of July 2017 03:53:36 PM
Old 07-14-2017
Swap two characters in a string

I want to swap hyphen (-) and underscore (_) in a string. In fact only one will be present. So if it is hyphen I want to make it underscore and if it is underscore I want to make it hyphen.

I can write a long code like below. Is there any easy way?

Code:
#!/bin/ksh
 
typeset -i exists
str="ag-sd"
 
new_str=$str
 
exists=`print $new_str | grep "\-" | wc -l`
if [[ $exists -eq 1 ]]
then
   str=`print $new_str | sed 's/\-/\_/g'`
fi
 
exists=`print $new_str | grep "\_" | wc -l`
if [[ $exists -eq 1 ]]
then
   str=`print $new_str | sed 's/\_/\-/g'`
fi
 
print "Old string $new_str"
print "New string $str"

 

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curs_instr(3X)															    curs_instr(3X)

NAME
instr, innstr, winstr, winnstr, mvinstr, mvinnstr, mvwinstr, mvwinnstr - get a string of characters from a curses window SYNOPSIS
#include <curses.h> int instr(char *str); int innstr(char *str, int n); int winstr(WINDOW *win, char *str); int winnstr(WINDOW *win, char *str, int n); int mvinstr(int y, int x, char *str); int mvinnstr(int y, int x, char *str, int n); int mvwinstr(WINDOW *win, int y, int x, char *str); int mvwinnstr(WINDOW *win, int y, int x, char *str, int n); DESCRIPTION
These routines return a string of characters in str, extracted starting at the current cursor position in the named window. Attributes are stripped from the characters. The four functions with n as the last argument return a leading substring at most n characters long (exclu- sive of the trailing NUL). RETURN VALUE
All of the functions return ERR upon failure, or the number of characters actually read into the string. X/Open defines no error conditions. In this implementation, if the window parameter is null or the str parameter is null, a zero is returned. NOTES
Note that all routines except winnstr may be macros. PORTABILITY
SVr4 does not document whether a length limit includes or excludes the trailing NUL. The ncurses library extends the XSI description by allowing a negative value for n. In this case, the functions return the string ending at the right margin. SEE ALSO
curses(3X). curs_instr(3X)
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