eclecticmiraclecat

Javascript

function sum(a, b) {
    return a + b
}

let sum = (a, b) => {
    return a + b
}

Stack

                192.168.1.109
                +---------+
                | haproxy |
                +---------+

    pg1             pg2             pg3
+----------+    +----------+    +----------+
| patroni  |    | patroni  |    | patroni  |

run docker

docker run -it jberkus/pgreplicationtutorial

tmux

[ctrl]+b c
su - postgres
[ctrl]+b n
[ctrl]+b n

WHERE

+-----------+----------+
| firstname | lastname |
+-----------+----------+
| alice     | bob      |
+-----------+----------+

SELECT

# views.py
def display(request):
  context = {'hi': 'bob'}
  return render(request, 'firstApp/index.html', context)

<!-- index.html -->
{{ hi }}

python3 manage.py startapp polls

polls/templates/polls/index.html

polls/static/polls/css/style.css polls/static/polls/images/hi.jpg

# views.py
def display(request):

# models.py
class Employee(models.Model):
  firstName = models.CharField(max_length=30)
  lastName = models.CharField(max_length=30)
  salary = models.FloatField()
  email = models.CharField(max_length=30)

	In [69]: package_details = ['Weight:', 2, 'Weight:', 4 ]

	In [71]: package_details[::2]
	Out[71]: ['Weight:', 'Weight:']

	In [72]: package_details[1::2]
	Out[72]: [2, 4]

	In [73]: total_weight = sum(v for k, v in zip(package_details[::2], package_details[1::2]) if k == 'Weight:')

	In [50]: students =[
	{'name': 'Paul Allen', 'class': 'Science', 'grade': 'A'},
	{'name': 'paul allen', 'class': 'Math', 'grade': 'C'},
	{'name': 'Bob Lewis', 'class': 'Science', 'grade': 'D'},
	{'name': 'Bob Lewis', 'class': 'math', 'grade': 'b'},
	{'name': 'bob Lewis', 'class': 'History', 'grade': 'f'}
	]

	In [52]: sorted(students)
	---------------------------------------------------------------------------

	https://stackoverflow.com/questions/5389507/iterating-over-every-two-elements-in-a-list

	https://stackoverflow.com/questions/5764782/iterate-through-pairs-of-items-in-a-python-list