HTTP Status
Informative |
100 |
Continue |
101 |
Switching Protocol |
Success |
200 |
OK |
201 |
Created (POST) |
202 |
Accepted |
203 |
Non-Authoritative Information |
204 |
No Content |
Redirect |
301 |
Move Permanently |
Client Error |
400 |
Bad Request |
401 |
Unaithorized |
402 |
Payment Required |
403 |
Forbidden |
404 |
Not Found |
408 |
Timeout |
429 |
Too Many Requests |
451 |
Illegal |
Server Error |
500 |
Internal Server Error |
502 |
Bad Gateway |
503 |
Service Unavailable |
Python
List |
lst |
[10, 20, 30, 40, 50] |
lst[:-1] |
[10, 20, 30, 40] |
lst[1:-1] |
[20, 30, 40] |
lst[::2] |
[10, 30, 50] |
lst[::-1] |
[50, 40, 30, 20, 10] |
| |
and, or, not, True False |
| |
Import |
from mod import mod1, mod2 |
mod1() |
import mod |
mod.mod1() |
| |
Operators |
+ - / // % * |
a |
Operations |
.len() |
.sorted(list) |
list.sort() |
.reversed(list) |
list.reverse() |
| |
Lists Operations |
.append() |
[ , , []] |
.extend() |
[ , , , ] |
.insert(index, value) |
.remove() |
| |
Dictionaries Operations |
{key: value} |
d[key] |
value |
.update() |
.values() |
.keys() |
a |
Strings |
.count() |
.index() |
.upper() |
.capitalize() |
.split("_") |
.strip(" ") |
Remove todos os caracteres |
|
|
MySQL
SELECT column1, column2 FROM table_name WHERE x = "ads" ORDER BY column1 DESC |
SELECT COUNT(column_name) FROM table_name WHERE condition; |
SELECT AVG(column_name) FROM table_name WHERE condition; |
SELECT SUM(column_name) FROM table_name WHERE condition; |
SELECT column1, ... FROM table_name WHERE columnN LIKE pattern; % - any, _something |
| |
INSERT INTO table name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...) |
UPDATE table_name SET column1 = value1, column2 = value2, ... WHERE condition |
DELETE FROM table_name WHERE condition |
CREATE TABLE table_name (column1 datatype, column2 datatype, ...) |
| |
DROP TABLE table_name |
DROP DATABASE databasename |
ALTER TABLE table_name ADD column_name datatype; |
ALTER TABLE table_name DROP COLUMN column_name; |
ALTER TABLE table_name MODIFY COLUMN column_name datatype; |
Java
Arrays |
.equals(Object[] arr1, Object[] arr2) |
.sort(Object[] arr) |
.toString() |
| |
String |
.indexOf(char a) |
.charAt(int index) |
.equals(String s) |
.format(String s, int 1, String 2, int 3, ...) |
.length() |
.subString(int beginIndex, int endIndex) |
.toLowerCase() |
.toUpperCase() |
| |
List<E> |
.add(int index, E element) |
.add (E element) |
.contains(Object o) |
.get(int index) |
.indexOf(Object o) |
.isEmpty() |
.remove(int index) |
.remove(Object o) |
.set(int index, E Element) |
.size() |
.toArray() |
.subList(int fromIndex, int toIndex) |
| |
HashMap<Object Key, Object Value> |
.get(Object Key) |
.put(Key key, Value value) |
.remove(Object key) |
.replace(K key, V value) |
.size() |
.values() |
.containsKey(Object Key) |
.containsValue(Object Value) |
| |
HashSet<E> |
.add(E e) |
.contains(Object o) |
.remove(Object o) |
.size() |
.isEmpty() |
.clear() |
| |
jUnits |
void teste(){ ... } |
assertEquals(exp, comp) |
|
|
GIT
Criar repo |
git init |
Aceder a staging area |
git status |
Adicionar ficheiro a Staging Area |
git add {nome do ficheiro} |
Remover da Staging Area |
git reset HEAD -- <file> |
Dar commit |
git commit -m "Commit message" |
Criar novo branch |
git branch <new-branch-name> |
Mudar de branch |
git checkout {branch} |
Merge Branch |
git merge <branch-name> |
Push para remoto |
git push <remote> <branch> |
Atualizar |
git pull |
Remover ficheiro do repositorio |
git rm <file> |
Mongoose
Schema.create({ nome: name, password }) |
Schema.findOne({ _id: id }) |
Schema.find({ name: name }) |
Schema.exists({ _id: id }) |
Schema.updateMany({ {_id: id}, {name: name} }) |
Schema.deleteOne({ _id: id }) |
SOLID Principles
Single Responsibility |
Class can have one responsibility |
Open/Closed |
Interfaces = - if's |
Liskov Substitution |
Subclass can do what Super does |
Interface Segregation |
Threedimensional shape x shape |
Dependency Inversion |
ExpressJS
const express = require('express')(); |
Get |
app.get('/info', (req, res)=>{}) |
Post |
app.post('/:id', (req, res) => {)) |
| |
Send |
res.status(200).send({}) |
Redirect |
res.redirect(301, '/') |
ReactJs
render(){return(<div>...</div>)} |
Array => .map(() => { ... }) |
onClick = {() => this.handleSomething()} |
Counters: <Counter onDelete={}/> |
Counter: this.props.onDelete |
| |
Class |
state = {...json...} |
this.setState({count: this.state.count + 1}) |
| |
componentDidMount |
componentDidUpdate |
componentWillUnmount |
|
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