Comp 2673, Spring 2002

April 15, lecture notes



Reading:
    No new reading assignment -
    Make sure you are done with 1-8, 10 and 12 in the Unix book
       and are done reviewing 6-8 in D&D

Some more info on emacs:
    Commands for movement:
      arrow keys:      up    down   left  right
      or control keys: C-p   C-n    C-b   C-f
         (think of these as previous-line, next-line, forward-char, back-char
      To move faster:
      Esc-f (forward a word)
      Esc-b (backward a word)
      C-a   (beginning of line)
      C-e   (end of line)
      C-v   (forward one screen)
      Esc-v (backward one screen)
      Esc-< (beginning of file)
      Esc-> (end of file)
    Search and replace:
      C-s - incremental search
      C-r - incremental search backwards
      C-s C-s - repeat previous search (if you've moved since the last search)
      Esc % - query search and replace
    Deleting text:
      C-d - delete character
      <del> - delete character in backwards direction
      Esc d - delete word
      Esc <del> - delete word in backwards direction
      C-k - kill line
    Editing using regions
      A marked region lies between a mark that you set and the cursor.
      C-<space> - set a mark
      C-w - delete marked region
      Esc-w - copy region
      C-y - paste copied region
    Recovering from errors
      C-g Cancel the current command
      C-x u - undo (can be repeated)
      Move cursor, then C-x u - redo command that has just been undone
      Esc-x revert-buffer <return> - undo all changes since file last saved
      Esc 5 C-x u - undo the last 5 commands
    Cool features
      Esc 7 - repeat the next command 7 times
      C-t  transpose two characters
      Esc-t - transpose two words
      Esc-c - capitalize word
      Esc-u - make word upper case

A cool unix command:
    The "cal" command prints a calendar for a specific month or a specific year
      % cal 4 2002
      % cal 1962

We'll also spend some time talking about the design of the programming project