Function into Class

Convert 3 functions into a class with 3 methods.

Before

def calculate_area(length, width):
    result = length * width
    return result

def calculate_perimiter(length, width):
    result = 2 * (length + width)
    return result

def calculate_volume(length, width, height):
    result = length * width * height
    return result

After

class Calculator:
    @staticmethod
    def get_area(len, wid):
        return len * wid

    @staticmethod
    def get_perimiter(len, wid):
        return 2 * (len + wid)

    @staticmethod
    def get_volume(len, wid, hei):
        return len * wid * hei

Preview

Command

%scalculate<enter>cget<esc>

O@staticmethod<esc>jj

vglyx<alt-d>xbRkxx

slength|width|height<enter>

bllled%>O<backspace>

class Calculator:

1. % selects the entire file

2. s searches inside the current selection and creates sub-selections based on a pattern. Input calculate then hit <enter> to make a selection on all instances of the word

3. c then type get to change each "calculate" word into a "get"

4. <esc> to go back to normal mode

5. Use O to create an empty line above each cursor, write:

   @staticmethod
   

6. Hit <esc> to go into normal mode.

7. jj moves each cursor down two lines

8. vgl selects the rest of each line past each cursor

9. y copies each selection

10. x<alt-d> selects each cursor's line and deletes the line without copying the selection

11. xb selects the last word of each cursor's line

12. R replaces each selection with the copied selections from earlier

13. kxx moves each cursor up one line and selects that line as well as the line below

14. s brings up a prompt to select sub-selections by a given regex. Typing length|width|height followed by <enter> will select each instance of those 3 words: length, width, and height

15. Our cursor is currently at the end of each word. Let's go to the beginning with b

16. We want to keep the first 3 characters and discard the rest from each of the parameters. To do this, move to the 4th character with lll

17. Use e to select until the end of each word and then d to delete it

18. Select whole file with % and indent with >

19. O creates a newline above and enters Insert mode, then <backspace> to delete an extra tab

20. Write this:

    class Calculator: