Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

deleteln(3ncurses)


NAME

   deleteln,  wdeleteln, insdelln, winsdelln, insertln, winsertln - delete
   and insert lines in a curses window

SYNOPSIS

   #include <curses.h>

   int deleteln(void);
   int wdeleteln(WINDOW *win);
   int insdelln(int n);
   int winsdelln(WINDOW *win, int n);
   int insertln(void);
   int winsertln(WINDOW *win);

DESCRIPTION

   The deleteln and wdeleteln routines delete the line under the cursor in
   the  window;  all  lines  below the current line are moved up one line.
   The bottom line of the window is cleared.  The cursor position does not
   change.

   The  insdelln  and  winsdelln  routines, for positive n, insert n lines
   into the specified window above the current line.  The n  bottom  lines
   are  lost.  For negative n, delete n lines (starting with the one under
   the cursor), and move the remaining lines up.  The bottom n  lines  are
   cleared.  The current cursor position remains the same.

   The  insertln  and  winsertln  routines  insert  a blank line above the
   current line and the bottom line is lost.

RETURN VALUE

   All routines return the integer  ERR  upon  failure  and  an  OK  (SVr4
   specifies  only  "an  integer  value  other  than ERR") upon successful
   completion.

   X/Open defines no error conditions.  In  this  implementation,  if  the
   window parameter is null, an error is returned.

PORTABILITY

   These functions are described in the XSI Curses standard, Issue 4.  The
   standard specifies that they return ERR on failure,  but  specifies  no
   error conditions.

NOTES

   Note that all but winsdelln may be macros.

   These  routines do not require a hardware line delete or insert feature
   in  the  terminal.   In  fact,  they  will  not   use   hardware   line
   delete/insert  unless  idlok(...,  TRUE)  has  been  set on the current
   window.

SEE ALSO

   ncurses(3NCURSES)

                                                        deleteln(3NCURSES)



Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.



Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.



Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.



Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.


birds banner