ccarvalho-eng

```sql
SELECT 
  json_agg(
    json_build_object(
     'first_name', u.first_name, 
     'last_name', u.last_name, 
     'email', u.email 
   )
) FROM users AS u
```

ccarvalho-eng

```python
class Journal:
    def __init__(self, date):
        self.date = date


class Meeting(Journal):
    def __init__(self, date, time):
        super().__init__(date)
        self.time = time

ccarvalho-eng

1. Fold / Unfold
    1. z c → fold
    2. z o → unfold
    3. z r → open recursively
2. Find + Replace
    1. S s p
    2. C c + C e
    3. :%s/<WORD>/<UPDATED WORD>
    4. C c + C c
3. Minimap

ccarvalho-eng

α - Α → alpha
β - Β → beta
γ - Γ → gamma
δ - Δ → delta
ε - Ε → epsilon
ζ - Ζ → zeta
η - Η → eta
θ - Θ → theta
ι - Ι → iota
κ - Κ → kappa

ccarvalho-eng

Print file names

```
for f in *.jpg; do echo ${f}; done;

ccarvalho-eng

```erlang
-module(fact). 

% fact module 

-export([run/1]). 

-spec run(integer()) -> integer(). 
run(N) when N > 0 -> 
  N * run(N-1); 

ccarvalho-eng

SPC
    SPC: find file
    , switch buffer
    . browse files
    : MX
    ; EX
    < switch buffer
    ` eval
    u universal arg
    x pop up scratch

ccarvalho-eng

-module(all_atoms).

-export([all_atoms/0]).

atom_by_number(N) ->
    binary_to_term(<<131,75,N:24>>).

all_atoms() ->
    atoms_starting_at(0).

ccarvalho-eng

{
  "title": "Erlang Atoms",
  "description": "",
  "visuals": [
    {
      "title": "Atom usage",
      "description": "Usage of atoms in Erlang and the configured limit.",
      "line_label": "%name% %hostname%-%type%",
      "display": "LINE",
      "format": "number",

ccarvalho-eng

const webSocket = new WebSocket('wss://echo.websocket.org');

//Event listeners are the pillars upon which WebSockets are built. This event fires when the WebSocket is considered 'OPEN',
//which means that it has connected successfully.
webSocket.addEventListener('open', function(event) {
  console.log('websocket connected successfully') //log this into the browser console so we can check if the websocket connected
});


//This is a global reference to the websocket that we created. We need this because otherwise multiple JS