moved my notes to my-learning

my-learning/buffer-tut.txt

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+Buffer
+----------
+
+Defination: It is the in-memory defination of a file.
+	    It represent the content of the file by 
+	    storing it inside memory.
+
+Opening multipe files in Vim.
+
+* From terminal
+   vim <file-1> <file-2> ....
+
+
+* Shell expansion shortcuts:
+   vim file*
+
+   This will open all the file which follow pattern
+   in their file name that is mentioned as an argument
+   here. 
+
+* To see all the open buffers:
+
+   Use commands: :buffers
+
+* To know more on buffers:
+
+   Use commands: :h :buffers
+
+* To change the buffer to another opened file
+
+   :buffer <buffer number>
+   :buffer <filename>
+
+   Note : Instead of :buffer, we can use :b.
+
+* To open to the next buffer of the current opened buffer.
+
+   We can use: :bnext or :bn
+   
+   To do this in opposite direction we can use:
+
+   :bprevious or :bp
+
+* To go to the first buffer.
+
+   :bfirst or :bf
+
+* To go the last buffer.
+
+   :blast or :bl
+
+* Shortcut key-binding to move to the previously editing buffer.
+
+   CTRL + ^
+
+* The %a and # symbol meaning.
+
+   %a : Represent the active buffer and currently loaded.
+   #  : Represent the previously editing buffer.
+
+* Another way to move back to the alternate buffer.
+
+   :b#
+
+%% TIPS %%
+
+When we try to do the editing on the current buffer and check the 
+buffer list.
+It will present a '+' indicating that the editing done is not saved.
+And when we try to change the buffer, it wil throw error.
+
+We can still force to change the buffer by using '!'.
+
+------------------------------
+
+There are three states of buffer.
+
+-> Active state and showing the buffer.
+
+-> Inactive state and not shown in the buffer.
+
+-> Inactive state but in the memory. (#h +)
+
+
+* To allow the buffer to be hidden without writing it into the file.
+  We can use option:
+   :set hidden
+
+   This allow to edit multiple buffer without necessarily writing it.
+
+* To abandone all the changes of all the buffer.
+
+   :qall!
+
+* To save all the changes of all the buffer.
+
+   :wall
+
+* To open another file without switching to that new window of the same file.
+
+   :badd <filename>
+
+* To unload a currently active buffer.
+
+   :bdelete or :bd <name or number> -> This is optional if the buffer is not the current active file.
+
+* To delete range of buffer.
+
+   :<start-number>,<end-number>bd
+
+   and 
+  To delete all the buffer.
+   :%bd
+
+* To execute a line command on each and every buffer.
+
+   :bufdo set <option>
+   :bufdo ....
+
+* To execute multiple line command in line-command mode.
+
+   We can use '|' symbol.
+
+----------------------------------------------------------------------
+
+
+Explore
+--------
+
+Command: :Explore or :E
+
+It is file explorer CLI which allow to navigate directory and open any file in the buffer.
+This CLI like look also a special buffer which we can delete using :bd command.
+
+
+
+--------------------------------------------------------------------------------------------------
+
+Multiple Buffer:
+----------------
+
+
+Command: vim <filename-pattern>*
+
+    To open all the file name following the pattern.
+
+
+Command: :sp or :split
+
+    To split window horizontally and open two buffer at the same time.
+
+    To achieve same thing we can use "CTRL+w s"
+
+
+
+Command: :vs or :vsplit
+
+    To vertically split the window and open two buffer at the same time.
+
+    To achieve same thing we can use "CTRL+w v"
+
+
+Command: CTRL+w q
+
+    To close the current active buffer window.
+
+Command: :on or :only or CTRL+w o
+
+    To close the all the window except the current active window.
+
+
+--> To Navigate through windows using h,j,k,l
+
+    Same motion for these key can be used for window navigation using
+    CTRL+w h,j,k,l. (left, down, up, right)
+
+
+--> To adjust and modify the size of the window.
+
+    CTRL+w +: To increase the height of the window.
+    CTRL+w -: To decrease the height of the window.
+    CTRL+w >: To increase the width of the window.
+    CTRL+w <: To increase the width of the window.
+    CTRL+w _: To set the height of the window to maximum.
+    CTRL+w |: To maximize the width fo the window to maximum.
+    CTRL+w =: To make all the window equal in size.
+
+
+--> To arrange the windows buffer.
+
+    CTRL+w r: To rotate the respective buffer in clockwise-direction.
+    CTRL+w R: To rotate the respective buffer in opposite-direction
+    CTRL+w h: To move buffer to edge left with full height.
+    CTRL+w j: To move buffer to bottom edge with full width.
+    CTRL+w k: To move buffer to top edge with full width.
+    CTRL+w l: To move buffer to right edge with full height.
+
+
+Command: :ball
+
+    To open all the buffer and split is horizontal.
+
+    Vim will try to open all buffer. But, if enough space
+    is not present then it will stop opening remaining buffer.
+
+
+--> To execute a action command on every opened window.
+
+    Use ":windo <command>". <command> can be, for example,
+    substitution command.