Info Catalog eintr: what-line eintr: Narrowing & Widening

eintr: narrow Exercise

 
 6.3 Exercise with Narrowing
 ===========================
 
 Write a function that will display the first 60 characters of the
 current buffer, even if you have narrowed the buffer to its latter half
 so that the first line is inaccessible.  Restore point, mark, and
 narrowing.  For this exercise, you need to use a whole potpourri of
 functions, including ‘save-restriction’, ‘widen’, ‘goto-char’,
 ‘point-min’, ‘message’, and ‘buffer-substring’.
 
    (‘buffer-substring’ is a previously unmentioned function you will
 have to investigate yourself; or perhaps you will have to use
 ‘buffer-substring-no-properties’ or ‘filter-buffer-substring’ ..., yet
 other functions.  Text properties are a feature otherwise not discussed
 here.  Text Properties (elisp)Text Properties.)
 
    Additionally, do you really need ‘goto-char’ or ‘point-min’?  Or can
 you write the function without them?
 

Info Catalog eintr: what-line eintr: Narrowing & Widening