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authorIndrajith K L2022-12-03 17:00:20 +0530
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+ _ _ __ __
+ | | | | _ \ \ / /
+ | |_| | ___ | | (_) \ \/ /
+ | _ | / _ \ | | _ ) (
+ | | | | | __/ | | | | / /\ \
+ |_| |_| \___| |_| |_| /_/ \_\
+
+ A post-modern modal text editor.
+_________________________________________________________________
+
+ Welcome to the Helix editor! Helix is different from editors
+ you might be used to in that it is modal, meaning that it has
+ different modes for editing text. The primary modes you will
+ use are Normal mode and Insert mode. While in Normal mode, the
+ keys you press won't actually type text. Instead, they will
+ perform various actions with the text. This allows for more
+ efficient editing. This tutor will teach you how you can make
+ use of Helix's modal editing features. To begin, ensure your
+ caps-lock key is not pressed and hold the j key until you reach
+ the first lesson.
+
+
+=================================================================
+= BASIC CURSOR MOVEMENT =
+=================================================================
+
+ ↑
+ k * h is on the left
+ ← h l → * l is on the right
+ j * j looks like a down arrow
+ ↓
+
+ The cursor can be moved using the h, j, k, l keys, as shown
+ above. The cursor/arrow keys will also work, but it is faster
+ to use the hjkl keys as they are closer to the other keys you
+ will be using. Try moving around to get a feel for hjkl.
+ Once you're ready, hold j to continue to the next lesson.
+
+
+
+
+
+
+
+=================================================================
+= EXITING HELIX =
+=================================================================
+
+ 1. Press the : key to enter command mode. Your cursor will
+ move to the bottom of the screen.
+ 2. Type q or quit and press <ENTER> to exit Helix.
+
+ Note: The quit command will fail if there are unsaved changes.
+ To force quit and DISCARD these changes, use q! or quit!.
+ You will learn how to save files later.
+
+ To exit command mode without entering a command, press <ESC>.
+
+ Now, move on to the next lesson.
+
+
+
+
+
+
+
+=================================================================
+= DELETION =
+=================================================================
+
+ Press the d key to delete the character under the cursor.
+
+ 1. Move the cursor to the line below marked -->.
+ 2. Move the cursor to each extra character, and press d to
+ delete it.
+
+ --> Thhiss senttencee haass exxtra charracterss.
+
+ Once the sentence is correct, move on to the next lesson.
+
+
+
+
+
+
+
+
+
+=================================================================
+= INSERT MODE =
+=================================================================
+
+ Press the i key to enter Insert mode.
+
+ 1. Move the cursor to the line below marked -->.
+ 2. Move to a place in the line which is missing text and press
+ i to enter Insert mode. Keys you press will now type text.
+ 3. Enter the missing text.
+ 4. Press <ESC> to exit Insert mode and return to Normal mode.
+ 5. Repeat until the line matches the line below it.
+
+ --> Th stce misg so.
+ This sentence is missing some text.
+
+ Note: If you want to move the cursor while in Insert mode,
+ you may use the arrow keys instead of exiting and
+ reentering Insert mode.
+ Note: The status bar will display your current mode.
+ Notice that when you press i, 'NOR' changes to 'INS'.
+
+=================================================================
+= MORE ON INSERT MODE =
+=================================================================
+
+ As you saw, you can press i to enter Insert mode at the current
+ position of the cursor. There are a few other ways you can
+ enter Insert mode at different locations.
+
+ Common examples of insertion commands include:
+ i - Insert before the selection.
+ a - Insert after the selection. (a means 'append')
+ I - Insert at the start of the line.
+ A - Insert at the end of the line.
+
+ 1. Move to anywhere in the line below marked -->.
+ 2. Press A (<SHIFT> + a), your cursor will move to the end of
+ the line and you will be able to type.
+ 3. Type the text necessary to match the line below.
+
+ --> This sentence is miss
+ This sentence is missing some text.
+
+=================================================================
+= SAVING A FILE =
+=================================================================
+
+ Use :w/:write to save a file.
+
+ 1. Exit Helix using :q! as explained before, or open a new
+ terminal.
+ 2. Open a file in Helix by running: hx FILENAME
+ 3. Make some edits to the file.
+ 4. Press the : key to enter command mode.
+ 5. Type w or write, and press <ENTER> to save the file.
+
+ You can also use wq or write-quit to save and exit.
+
+ Note: You can optionally enter a filepath after the w/write
+ command in order to save to that path.
+ Note: If there are any unsaved changes to a file, a plus [+]
+ will appear next to the file name in the status bar.
+
+
+
+=================================================================
+= RECAP =
+=================================================================
+
+ * Use the h,j,k,l keys to move the cursor.
+
+ * Press : to enter command mode.
+ * The q/quit and q!/quit! commands will exit Helix. The
+ former fails when there are unsaved changes. The latter
+ discards them.
+ * The w/write command will save the file.
+ * The wq/write-quit command will do both.
+
+ * Press d to delete the character at the cursor.
+
+ * Press i to enter Insert mode and type text. Press <ESC> to
+ return to Normal mode.
+
+
+
+
+
+=================================================================
+= MOTIONS AND SELECTIONS =
+=================================================================
+
+ Press w to select forward until the next word.
+
+ The d key doesn't actually delete the character at the cursor,
+ it deletes all selected text. Your cursor is like a
+ single-character selection.
+
+ 1. Move the cursor to the line below marked -->.
+ 2. Move to the beginning of a word that needs to be deleted.
+ 3. Press w to select until the beginning of the next word.
+ 4. Press d to delete the selection.
+ 5. Repeat for all extra words in the line.
+
+ --> This sentence pencil has vacuum extra words in the it.
+
+
+
+
+
+=================================================================
+= MORE ON MOTIONS =
+=================================================================
+
+ As you saw, pressing w moves the cursor forward until the start
+ of the next word, selecting the text traversed. This is useful
+ for moving around text and for selecting text to operate on.
+
+ Some common motions include:
+ w - Move forward to before the beginning of the next word.
+ e - Move forward to the end of the current word.
+ b - Move backward to the beginning of the current word.
+
+ The w,e,b motions also have counterparts - W,E,B - which
+ traverse WORDS instead of words. WORDS are only separated by
+ whitespace, whereas words can be separated by other characters
+ in addition to whitespace.
+
+ All of these motions select the text they traverse.
+
+
+
+=================================================================
+= THE CHANGE COMMAND =
+=================================================================
+
+ Press c to change the current selection.
+
+ The change command deletes the current selection and enters
+ Insert mode, so it is a very common shorthand for di.
+
+ 1. Move the cursor to the line below marked -->.
+ 2. Move to the start of an incorrect word and press w to
+ select it.
+ 3. Press c to delete the word and enter Insert mode.
+ 4. Type the correct word.
+ 5. Repeat until the line matches the line below it.
+
+ --> This paper has heavy words behind it.
+ This sentence has incorrect words in it.
+
+
+
+
+=================================================================
+= COUNTS WITH MOTIONS =
+=================================================================
+
+ Type a number before a motion to repeat it that many times.
+
+ 1. Move the cursor to the line below marked -->.
+
+ 2. Type 2w to move 2 words forward.
+
+ 3. Type 3e to move to the end of the third word forward.
+
+ 4. Type 2b to move 2 words backwards
+
+ 5. Try the above with different numbers.
+
+ --> This is just a line with words you can move around in.
+
+
+
+
+
+=================================================================
+= SELECTING LINES =
+=================================================================
+
+ Press x to select a whole line. Press again to select the next.
+
+ 1. Move the cursor to the second line below marked -->.
+ 2. Press x to select the line, and d to delete it.
+ 3. Move to the fourth line.
+ 4. Press x twice or type 2x to select 2 lines, and d to delete.
+
+ --> 1) Roses are red,
+ --> 2) Mud is fun,
+ --> 3) Violets are blue,
+ --> 4) I have a car,
+ --> 5) Clocks tell time,
+ --> 6) Sugar is sweet,
+ --> 7) And so are you.
+
+
+
+
+=================================================================
+= UNDOING =
+=================================================================
+
+ Type u to undo. Type U to redo.
+
+ 1. Move the cursor to the line below marked -->.
+ 2. Move to the first error, and press d to delete it.
+ 3. Type u to undo your deletion.
+ 4. Fix all the errors on the line.
+ 5. Type u several times to undo your fixes.
+ 6. Type U (<SHIFT> + u) several times to redo your fixes.
+
+ --> Fiix the errors on thhis line and reeplace them witth undo.
+
+
+
+
+
+
+
+
+=================================================================
+= RECAP =
+=================================================================
+
+ * Type w to select forward until the next word.
+ * Type e to select to the end of the current word.
+ * Type b to select backward to the start of the current word.
+ * Use uppercase counterparts, W,E,B, to traverse WORDS.
+
+ * Typing d deletes the entire selection, so you can delete a
+ word forward by typing wd.
+
+ * Type c to delete the selection and enter Insert mode.
+
+ * Type a number before a motion to repeat it that many times.
+
+ * Type x to select the entire current line. Type x again to
+ select the next line.
+
+ * Type u to undo. Type U to redo.
+
+
+=================================================================
+= MULTIPLE CURSORS =
+=================================================================
+
+ Type C to duplicate the cursor to the next line.
+
+ 1. Move the cursor to the first line below marked -->.
+ 2. Type C to duplicate the cursor to the next line. Keys you
+ press will now affect both cursors.
+ 3. Use Insert mode to correct the lines. The two cursors will
+ fix both lines simultaneously.
+ 4. Type , to remove the second cursor.
+
+ --> Fix th two nes at same ime.
+ --> Fix th two nes at same ime.
+
+ Fix these two lines at the same time.
+
+
+
+
+
+=================================================================
+= THE SELECT COMMAND =
+=================================================================
+
+ Type s to select matches in the selection.
+
+ 1. Move the cursor to the line below marked -->.
+ 2. Press x to select the line.
+ 3. Press s. A prompt will appear.
+ 4. Type 'apples' and press <ENTER>. Both occurrences of
+ 'apples' in the line will be selected.
+ 5. You can now press c and change 'apples' to something else,
+ like 'oranges'.
+ 6. Type , to remove the second cursor.
+
+ --> I like to eat apples since my favorite fruit is apples.
+
+
+
+
+
+
+=================================================================
+= SELECTING VIA REGEX =
+=================================================================
+
+ The select command selects regular expressions, not just exact
+ matches, allowing you to target more complex patterns.
+
+ 1. Move the cursor to the line below marked -->.
+ 2. Select the line with x and then press s.
+ 3. Enter ' +' to select any amount of consecutive spaces >1.
+ 4. Press c and change the matches to single spaces.
+
+ --> This sentence has some extra spaces.
+
+ Note: If you want to perform find-and-replace, the select
+ command is the way to do it. Select the text you want
+ to replace in — type % to select the whole file — and
+ then perform the steps explained above.
+
+
+
+
+=================================================================
+= COLLAPSING SELECTIONS =
+=================================================================
+
+ Type ; to collapse selections to single cursors.
+
+ Sometimes, you want to deselect without having to move the
+ cursor(s). This can be done using the ; key.
+
+ 1. Move the cursor to the line below marked -->.
+
+ 2. Use the motions you have learned to move around the line,
+ and try using ; to deselect the text after it is selected
+ by the motions.
+
+ --> This is an error-free line with words to move around in.
+
+
+
+
+
+
+=================================================================
+ This tutorial is still a work-in-progress.
+ More sections are planned.