05-25-2013
Hmmmm - the requestor didn't ask for alternative solutions, he asked to explain why that "strange" behaviour occurred (which, btw, is not strange but correct). Let's go and try: According to the gawk man page, the array f will be filled with "the matches". The first match ( f[1] ) is being used as a separator in the following split, and then the chars before the first match (array[1]) will be substituted with "".
If there's no match, like in the second line, f will be empty, and split will use an empty separator, resulting in a per char split. array[1] will then hold the "S" which will be removed.
Logical, understandable?
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LEARN ABOUT OPENSOLARIS
scrl
scrl(3XCURSES) X/Open Curses Library Functions scrl(3XCURSES)
NAME
scrl, scroll, wscrl - scroll a window
SYNOPSIS
cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib
-R /usr/xpg4/lib -lcurses [ library... ]
c89 [ flag... ] file... -lcurses [ library... ]
#include <curses.h>
int scrl(int n);
int scroll(WINDOW *win);
int wscrl(WINDOW *win, int n);
PARAMETERS
n number and direction of lines to scroll
win pointer to the window in which to scroll
DESCRIPTION
The scroll() function scrolls the window win up one line. The current cursor position is not changed.
The scrl() and wscrl() functions scroll the window stdscr or win up or down n lines, where n is a positive (scroll up) or negative (scroll
down) integer.
The scrollok(3XCURSES) function must be enabled for these functions to work.
RETURN VALUES
On success, these functions return OK. Otherwise, they return ERR.
ERRORS
None.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |Unsafe |
+-----------------------------+-----------------------------+
SEE ALSO
clearok(3XCURSES), libcurses(3XCURSES), attributes(5), standards(5)
SunOS 5.11 5 Jun 2002 scrl(3XCURSES)