Display line numbers in vim. If a file is open with vim press ESC (if you are in insert mode) and then press colon (:) and type:

set number

The above command will print line numbers in front of each line.

Now if you want to hide line numbers you just need to press colon again and type:

set nonumber

#vim #tricks #line_number #nonumber #number

One the most useful commands in vim is to delete or change inside of a block like {} or inside of a charater like "SOME THING".

In case you want to just delete inside of something and you don't want to go into INSERT mode just press di keyboard buttons in order, otherwise press ci keyboard buttons to go in INSERT mode and change something.

Let's give an example. Suppose we have lines like below and we have opened it in vim:

user_id = "43dd94e5d79ffeb2ffffabd112d5e945"
 name = "Alireza"
 dob = "SECRET :)"

Place the cursor between double quotes somewhere in the SECRET :) and press d then press c keys and finally press double quote ("). The vim will search for the surrounding double quotes and will remove everything inside of it. Our output is:

user_id = "43dd94e5d79ffeb2ffffabd112d5e945"
 name = "Alireza"
 dob = ""

Now let's assume we have a block of code like below:

users_data = {
 }

Go inside of the block of curly braces (`{}`) and put your cursor inside of the block. Now press c on your keyboard then press i afterward, and at the end press { on your keyboard. It will delete everything inside of {} for you and put your vim mode in INSERT mode. So you would have the following output:

users_data = {
 }

You can do the same with every block of code and every character like (), [], '', etc.

ci stands for Change Inside
di stands for Delete Inside

#vim #tricks #commands #change #delete #ci #di

To join lines in PyCharm first select you lines, then use CTRL+Shift+j (⌃⇧J) to put them in one line.

#pycharm #tricks #join #join_lines

How to add comma to end of multiple lines in VIM? Yeah, that's tricky boy :))))

1- First go to Visual Block mode by pressing ^v (CTRL+V)

2- Now select your mutiple lines by going down using down arrow button.

3- Go to end of line by pressing end command in your keyboard in linux and windows or if you're using MAC by pressing fn+right arrow.

4- Now press shift+A (It worked in MAC in linux we needn't that)

5- type comma

6- press ESC (wait one second or so)

Voila! We're done.

#vim #tricks #VB #visual_block

In-place value swapping

# Let's say we want to swap
# the values of a and b...
a = 23
b = 42

# The "classic" way to do it
# with a temporary variable:
tmp = a
a = b
b = tmp

# Python also lets us
# use this short-hand:
a, b = b, a

#python #swap #tricks