DEV Community: Louie Aroy

Git cheatsheet

Louie Aroy — Mon, 18 Nov 2019 07:40:28 +0000

Add all files to be saved

git add .

Save changes offline

git commit -m "Changed something comment"

Push changes to online server

git push

Undo local changes and save them if you want to revert again

git stash

# delete stash
git stash drop

Apply new gitignore

# "cache/" is the file or folder you want to remove tracking
git rm -r --cached cache/
git add .
git commit -m ".gitignore is now working"

Remove remote origin to reupload files to source control provider

git remote remove origin

Upload repo to source control provider

git remote add origin https://username@your.bitbucket.domain:7999/yourproject/repo.git 
git push -u origin master

Merge branches

# list local branches
git branch

# create a new branch
git checkout -b new_branch

# switch to a branch
git checkout branch_name

# merge the new branch to master branch
git checkout master
git merge --squash new_branch
git commit -m "new_branch and master branch merged"

Delete a branch

# delete a local branch
git branch -d branch_name

# force delete a local branch
git branch -D branch_name

# delete a branch on github/bitbucket
git push remote_name --delete branch_name

Use git to maintain website in server
http://toroid.org/git-website-howto

Python Cheatsheet

Louie Aroy — Fri, 08 Nov 2019 10:45:14 +0000

Basic syntax examples for programmers who are starting to learn python.

Comments

# This is a single line comment

Numbers

# declare int
day = 18

# declare float
amount = 2.5



brothers_age = 30
my_age = 25

# math equation
age_gap = brothers_age - my_age

# output to console
print(age_gap)

"""
Result:
5
"""

Strings

# declare strings
first_name = "Louie"
last_name = "Aroy"
age = 25


print(first_name, last_name, age)

# concatenate
print(first_name + " " + last_name + " " + age)

"""
Result:
Louie Aroy 25
Louie Aroy 25
"""

List


# declare list
players = [25, 58, 66, 71, 87]

print (players[2])

"""
Result: 
66
"""


# update list value
players[2] = 68

print (players)
Result:
[29, 58, 68, 71, 87]

# add variables to list
players.append(120)

print (players)

"""
Result:
[29, 58, 68, 71, 87, 120]
"""

# add multiple variable to list
players + [122, 123, 124]

print (players)

"""
Result:
[29, 58, 68, 71, 87, 120, 122, 123, 124]
"""

If Else

name = "Tommy"

if name is "Bucky":
    print("Hey there Bucky")
elif name is "Lucy":
    print("What up Lucy?")
elif name is "Sammy":
    print("What up Slammy?")
else:
    print("Please sign up for the site!")


"""
Result:
Please sign up for the site!
"""

For Loop

foods = ['bacon', 'tuna', 'ham', 'snausages', 'beef']

for food in foods:
    print(food)
    print(len(food))


"""
Result:
bacon
5
tuna
4
ham
3
snausages
9
beef
4
"""

Loop with Range


# loop 5 times
for x in range(5):
    print("I'm awesome!")


# loop in 8 inclusive upto 12 exclusive
for x in range(8, 12):
    print(x)

"""
Result:
I'm awesome!
I'm awesome!
I'm awesome!
I'm awesome!
I'm awesome!


8
9
10
11
"""

While loop

pimples = 5

while pimples < 10:
    print(pimples)
    pimples += 1

Functions

# declare a function
def bitcoin_to_usd(btc):
    amount = btc * 527
    print(amount)

# call a function
bitcoin_to_usd(3.85)
bitcoin_to_usd(1)
bitcoin_to_usd(13)

"""
Result:
2028.95
527
6851
"""

Return Values

def allowed_dating_age(my_age):
    girls_age = my_age/2 + 7
    return girls_age

buckys_limit = allowed_dating_age(27)
print("Bucky can date girls", buckys_limit, "or older")

creepy_joe_limit = allowed_dating_age(49)
print("Creepy Joe can date girls", creepy_joe_limit, "or older")

"""
Result:
Bucky can date girls 20.5 or older
Creepy Joe can date girls 31.5 or older
"""

Default Values for Arguments

def get_gender(sex='Unknown'):
    if sex is 'm':
        sex = "Male"
    elif sex is 'f':
        sex = 'Female'
    print(sex)

get_gender('m')
get_gender('f')
get_gender()

"""
Result:
Male
Female
Unknown
"""

Keyword Arguments

def dumb_sentence(name='Bucky', action='ate', item='tuna'):
    print(name, action, item)

dumb_sentence()
dumb_sentence("Sally", "laughs", "hard")
dumb_sentence(item="awesome", action="is")

"""
Result:
Bucky ate tuna
Sally laughs hard
Bucky is awesome
"""

Dictionary

# declare a dictionary
classmates = {
    'Tony': 'cool but smells', 
    'Emma': 'sits behind me', 
    'Lucy': 'asks too many questions'
}

# loop through the dictionary
for k, v, in classmates.items():
    print(k, v)

# output one dictionary value
print(classmates['Tony'])


"""
Result:
Lucy asks too many question
Tony cool but smells
Emma sits behind me

cool but smells
"""

Class

# create a class
class Person:
  # on initialize
  def __init__(self, name, age):
    self.name = name
    self.age = age

  def introduce(self):
    print("Hello my name is " + self.name + ", " + self.age + " years old.")

p1 = Person("John", 36)
p1.introduce()

"""
Result:
Hello my name is John, 36 years old.
"""

Inheritance

# inherit from above class
class Student(Person):

  def studentIntro(self):
      print("Hi classmates, my name is " + self.name + ", " + self.age + " years old.")


s1 = Student("Luigi", 15)
s1.introduce()
s1.studentIntro()

"""
Result:
Hello my name is Luigi, 15 years old.
Hi classmates, my name is Luigi, 15 years old.
"""

Modules

tuna.py
def fish()
    print("I am a tuna feesh!")


main.py
import tuna

tuna.fish()

"""
Result:
I am a tuna feesh!
"""

Reference:
TheNewboston Python Tutorial
https://www.youtube.com/watch?v=HBxCHonP6Ro&list=PL6gx4Cwl9DGAcbMi1sH6oAMk4JHw91mC_

Syntax
https://www.w3schools.com/python/

Challenges
https://edabit.com/challenges/python3

Comment per Algorithm Code Structure

Louie Aroy — Thu, 25 Jul 2019 04:19:01 +0000

When writing or building functions

First I write the name and variables of the function.

public function email_login($email, $password) {

}

Then I start describing the algorithm of the function line by line every step.

public function email_login($email, $password) {
    // check if email is existing
    // if existing verify password
    // if correct password return user information
    // if not show response invalid_password
    // if email is not existing show response email_not_found
}

Then I write the algorithm one by one checking if it is working in the program until the last step. And that's it I've completed building the full function.

public function email_login($email, $password) {
    // check if email is existing
    $this->db->where('email', $email);
    $query = $this->db->get('users');
    $user = $query->row_array();

    // if existing verify password
    if ($user != null) {
        // if correct password return user information
        if ($user["password"] == $password) {
            return $user;
        // if not show response invalid_password
        } else {
            return "invalid_password";
        }
    // if not show response email_not_found
    } else {
        return "email_not_found";
    }
}

The Tech Lead

Louie Aroy — Tue, 28 May 2019 18:25:06 +0000

https://www.codementor.io/npostolovski/8-tips-for-being-a-good-tech-lead-ke35g7em8#2-dont-code-full-time-but-dont-stop-coding-completely

People often become tech leads because they are a productive member of the team, able to churn out good quality code exceptionally quickly. The tendency is to operate in the same manner in the role of tech lead, not realizing that you may be maximizing your individual productivity at the expense of your team’s productivity.