Flutter Dev

Flutter Dev

1628868920

A Dart Circular Buffer Container Based on List with a Fixed Capacity

dart-circularbuffer

A circular buffer with a fixed capacity supporting all Dart List operations.

final buffer = CircularBuffer<int>(3)..add(1)..add(2);
print(buffer.length); // 2
print(buffer.first); // 1
print(buffer.isFilled); // false
print(buffer.isUnfilled); // true

buffer.add(3);
print(buffer.length); // 3
print(buffer.isFilled); // true
print(buffer.isUnfilled); // false

buffer.add(4);
print(buffer.first); // 4

Use this package as a library

Depend on it

Run this command:

With Dart:

 $ dart pub add circular_buffer

With Flutter:

 $ flutter pub add circular_buffer

This will add a line like this to your package's pubspec.yaml (and run an implicit dart pub get):


dependencies:
  circular_buffer: ^0.10.0

Alternatively, your editor might support dart pub get or flutter pub get. Check the docs for your editor to learn more.

Import it

Now in your Dart code, you can use:

import 'package:circular_buffer/circular_buffer.dart';

example/main.dart

import 'package:circular_buffer/circular_buffer.dart';

void main() {
  final cb = CircularBuffer<int>(5);

  final list = <int>[4, 5, 1, -3, 8, 2, 6, 7, 4, 5];
  var sum = 0;
  double mean;
  for (final a in list) {
    final first = cb.isFilled ? cb.first : 0;
    cb.add(a);
    sum += cb.last - first;

    mean = sum.toDouble() / cb.length;

    // ignore: avoid_print
    print('Inserting $a:\tsum=$sum\tmean=$mean');
  }
}

Download Details: 

Official Website: https://pub.dev/packages/circular_buffer


 

What is GEEK

Buddha Community

A Dart Circular Buffer Container Based on List with a Fixed Capacity
HI Python

HI Python

1640973720

Beyonic API Python Example Using Flask, Django, FastAPI

Beyonic API Python Examples.

The beyonic APIs Docs Reference: https://apidocs.beyonic.com/

Discuss Beyonic API on slack

The Beyonic API is a representational state transfer, REST based application programming interface that lets you extend the Beyonic dashboard features into your application and systems, allowing you to build amazing payment experiences.

With the Beyonic API you can:

  • Receive and send money and prepaid airtime.
  • List currencies and networks supported by the Beyonic API.
  • Check whether a bank is supported by the Beyonic API.
  • View your account transactions history.
  • Add, retrieve, list, and update contacts to your Beyonic account.
  • Use webhooks to send notifications to URLs on your server that when specific events occur in your Beyonic account (e.g. payments).

Getting Help

For usage, general questions, and discussions the best place to go to is Beyhive Slack Community, also feel free to clone and edit this repository to meet your project, application or system requirements.

To start using the Beyonic Python API, you need to start by downloading the Beyonic API official Python client library and setting your secret key.

Install the Beyonic API Python Official client library

>>> pip install beyonic

Setting your secrete key.

To set the secrete key install the python-dotenv modeule, Python-dotenv is a Python module that allows you to specify environment variables in traditional UNIX-like “.env” (dot-env) file within your Python project directory, it helps us work with SECRETS and KEYS without exposing them to the outside world, and keep them safe during development too.

Installing python-dotenv modeule

>>> pip install python-dotenv

Creating a .env file to keep our secrete keys.

>>> touch .env

Inside your .env file specify the Beyonic API Token .

.env file

BEYONIC_ACCESS_KEY = "enter your API "

You will get your API Token by clicking your user name on the bottom left of the left sidebar menu in the Beyonic web portal and selecting ‘Manage my account’ from the dropdown menu. The API Token is shown at the very bottom of the page.

getExamples.py

import os 
import beyonic
from dotenv import load_dotenv 

load_dotenv()

myapi = os.environ['BEYONIC_ACCESS_KEY']

beyonic.api_key = myapi 

# Listing account: Working. 
accounts = beyonic.Account.list() 
print(accounts)


#Listing currencies: Not working yet.
'''
supported_currencies = beyonic.Currency.list()
print(supported_currencies)

Supported currencies are: USD, UGX, KES, BXC, GHS, TZS, RWF, ZMW, MWK, BIF, EUR, XAF, GNF, XOF, XOF
'''

#Listing networks: Not working yet.
"""
networks = beyonic.Network.list()
print(networks)
"""

#Listing transactions: Working. 
transactions = beyonic.Transaction.list()
print(transactions) 

#Listing contact: Working. 
mycontacts = beyonic.Contact.list() 
print(mycontacts) 


#Listing events: Not working yet.
'''
events = beyonic.Event.list()
print(events)

Error: AttributeError: module 'beyonic' has no attribute 'Event'
'''

Docker file

FROM python:3.8-slim-buster

COPY . .

COPY ./requirements.txt ./requirements.txt

WORKDIR .

RUN pip install -r requirements.txt

CMD [ "python3", "getExamples.py" ]

Build docker image called demo

>>> docker build -t bey .

Run docker image called demo

>>>docker run -t -i bey 

Now, I’ll create a Docker compose file to run a Docker container using the Docker image we just created.


version: "3.6"
services:
  app:
    build: .
    command: python getExamples.py
    volumes:
      - .:/pythonBeyonicExamples

Now we are going to run the following command from the same directory where the docker-compose.yml file is located. The docker compose up command will start and run the entire app.


docker compose up

Output

NB: The screenshot below might differ according to your account deatils and your transcations in deatils.

docker compose up preview

To stop the container running on daemon mode use the below command.

docker compose stop

Output

docker compose preview

Contributing to this repository. All contributions, bug reports, bug fixes, enhancements, and ideas are welcome, You can get in touch with me on twitter @HarunMbaabu.

Download Details:
Author: HarunMbaabu
Source Code: https://github.com/HarunMbaabu/BeyonicAPI-Python-Examples
License: 

#api #python #flask #django #fastapi 

Flutter Dev

Flutter Dev

1628868920

A Dart Circular Buffer Container Based on List with a Fixed Capacity

dart-circularbuffer

A circular buffer with a fixed capacity supporting all Dart List operations.

final buffer = CircularBuffer<int>(3)..add(1)..add(2);
print(buffer.length); // 2
print(buffer.first); // 1
print(buffer.isFilled); // false
print(buffer.isUnfilled); // true

buffer.add(3);
print(buffer.length); // 3
print(buffer.isFilled); // true
print(buffer.isUnfilled); // false

buffer.add(4);
print(buffer.first); // 4

Use this package as a library

Depend on it

Run this command:

With Dart:

 $ dart pub add circular_buffer

With Flutter:

 $ flutter pub add circular_buffer

This will add a line like this to your package's pubspec.yaml (and run an implicit dart pub get):


dependencies:
  circular_buffer: ^0.10.0

Alternatively, your editor might support dart pub get or flutter pub get. Check the docs for your editor to learn more.

Import it

Now in your Dart code, you can use:

import 'package:circular_buffer/circular_buffer.dart';

example/main.dart

import 'package:circular_buffer/circular_buffer.dart';

void main() {
  final cb = CircularBuffer<int>(5);

  final list = <int>[4, 5, 1, -3, 8, 2, 6, 7, 4, 5];
  var sum = 0;
  double mean;
  for (final a in list) {
    final first = cb.isFilled ? cb.first : 0;
    cb.add(a);
    sum += cb.last - first;

    mean = sum.toDouble() / cb.length;

    // ignore: avoid_print
    print('Inserting $a:\tsum=$sum\tmean=$mean');
  }
}

Download Details: 

Official Website: https://pub.dev/packages/circular_buffer


 

Lindsey  Koepp

Lindsey Koepp

1603763460

AWS Bottlerocket vs. Google Container-Optimized OS: Which Should You Use and When

What’s the difference between popular Container-Centric OS choices, Google’s Container-Optimized OS, and AWS’s Bottlerocket? The concepts underlying containers have been around for many years. Container technologies like Docker, Kubernetes, and an entire ecosystem of products, as well as best practices, have emerged in the last few years. This has enabled different kinds of applications to be containerized.

Web service providers like Amazon AWS and Google are giving a further boost to container innovation, for enterprises to adopt and use containers at scale. This will help them to reap the benefits containers bring, including increased portability and greater efficiency.

Linux-based OS, AWS Bottlerocket is a new option, designed for running containers on virtual machines (VMs) or bare-metal hosts. In this article, you will learn the core uses and differences between the two open-source OS.

**AWS Bottlerocket **

It is an open-source, stripped-down Linux distribution that’s similar to projects like Google’s Container-Optimized OS. This single-step update process helps reduce management overhead.

_It makes OS updates easy to automate using container orchestration services such as Amazon Elastic Container Service (ECS) and Amazon Elastic Kubernetes Service (EKS). _

**Google Container-Optimized OS **

It’s an OS image for Google Compute Engine VMs that’s optimized for running Docker containers. It allows you to bring up your Docker containers on Google Cloud Platform securely, and quickly. It is based on the open-source Chromium OS project and is maintained by Google.

But before diving into the core differences, let us give you a basic overview of containers, VMs, and container-optimized OS, and its underlying challenges to better understand the differences.

If you are already aware of all the underlying processes of containers, then you can skip to the main differences for AWS Bottlerocket vs Google Container-Optimized OS.

#containers #amazon-aws #google-cloud #container-optimized-os #aws-containers #docker-containers #linux-based-os #orchestration

Skyla  Feeney

Skyla Feeney

1595336981

How to Combine Lists in Dart?

How to Combine Lists in Dart?

In Dart programming, the List data type is similar to arrays in other programming languages. A list is used to represent a collection of objects. It is an ordered group of objects. The core libraries in Dart are responsible for the existence of List class, its creation, and manipulation. There are 5 ways to combine two or more list:

  1. Using addAll() method to add all the elements of another list to the existing list.
  2. Creating a new list by adding two or more lists using addAll() method of the list.
  3. Creating a new list by adding two or more list using expand() method of the list**.**
  4. Using + operator to combine list.
  5. Using spread operator to combine list.

Using addAll() method to add all the elements of other lists to the existing list

We can add all the elements of the other list to the existing list by the use of addAll() method. To learn about this method you can follow this article.

Example:

Dart

// Main function 
main() { 

  // Creating lists 
  List gfg1 = ['Welcome','to']; 
  List gfg2 = ['GeeksForGeeks']; 

  // Combining lists 
  gfg1.addAll(gfg2); 

  // Printing combined list 
  print(gfg1); 
}

#dart #dart-list

Christa  Stehr

Christa Stehr

1602964260

50+ Useful Kubernetes Tools for 2020 - Part 2

Introduction

Last year, we provided a list of Kubernetes tools that proved so popular we have decided to curate another list of some useful additions for working with the platform—among which are many tools that we personally use here at Caylent. Check out the original tools list here in case you missed it.

According to a recent survey done by Stackrox, the dominance Kubernetes enjoys in the market continues to be reinforced, with 86% of respondents using it for container orchestration.

(State of Kubernetes and Container Security, 2020)

And as you can see below, more and more companies are jumping into containerization for their apps. If you’re among them, here are some tools to aid you going forward as Kubernetes continues its rapid growth.

(State of Kubernetes and Container Security, 2020)

#blog #tools #amazon elastic kubernetes service #application security #aws kms #botkube #caylent #cli #container monitoring #container orchestration tools #container security #containers #continuous delivery #continuous deployment #continuous integration #contour #developers #development #developments #draft #eksctl #firewall #gcp #github #harbor #helm #helm charts #helm-2to3 #helm-aws-secret-plugin #helm-docs #helm-operator-get-started #helm-secrets #iam #json #k-rail #k3s #k3sup #k8s #keel.sh #keycloak #kiali #kiam #klum #knative #krew #ksniff #kube #kube-prod-runtime #kube-ps1 #kube-scan #kube-state-metrics #kube2iam #kubeapps #kubebuilder #kubeconfig #kubectl #kubectl-aws-secrets #kubefwd #kubernetes #kubernetes command line tool #kubernetes configuration #kubernetes deployment #kubernetes in development #kubernetes in production #kubernetes ingress #kubernetes interfaces #kubernetes monitoring #kubernetes networking #kubernetes observability #kubernetes plugins #kubernetes secrets #kubernetes security #kubernetes security best practices #kubernetes security vendors #kubernetes service discovery #kubernetic #kubesec #kubeterminal #kubeval #kudo #kuma #microsoft azure key vault #mozilla sops #octant #octarine #open source #palo alto kubernetes security #permission-manager #pgp #rafay #rakess #rancher #rook #secrets operations #serverless function #service mesh #shell-operator #snyk #snyk container #sonobuoy #strongdm #tcpdump #tenkai #testing #tigera #tilt #vert.x #wireshark #yaml