05-31-2007
tr explanation please
how does below tr command replace nonletters with newlines?
I think I understand tr -cs '\n' part.. but what is
A-Za-z\' <--- what is this??
tr -cs A-Za-z\' '\n' |
-c --complement
-s, --squeeze-repeats
replace each input sequence of a repeated character that is listed in SET1 with a single occurrence of that charac-
ter
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LEARN ABOUT OPENSOLARIS
nl
nl(3XCURSES) X/Open Curses Library Functions nl(3XCURSES)
NAME
nl, nonl - enable/disable newline control
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 nl(void);
int nonl(void);
DESCRIPTION
The nl() function enables the handling of newlines. The nl() function converts newline into carriage return and line feed on output and
converts carriage return into newline on input. nonl() disables the handling of newlines.
The handling of newlines is initially enabled. Disabling the handling of newlines results in faster cursor motion since X/Open Curses can
use the line-feed capability more efficiently.
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
libcurses(3XCURSES), attributes(5), standards(5)
SunOS 5.11 5 Jun 2002 nl(3XCURSES)