In this video, I'll show how to create and run Angular app using Docker, without installing Node in the Host machine.

• Create folder

$ mkdir ng-docker && cd ng-docker

• Create Dockerfile file

FROM node:12-alpine
LABEL AUTHOR="Arunkumar Dharuman"
WORKDIR /code
RUN npm install -g @angular/cli

• Create docker-compose.yaml file

version …

In this video I'll show how create a self-signed SSL certificate and configure it on Windows 10 machine. Using Angular CLI and self-signed SSL Certificate to serve application over HTTPS localhost.

Hope this helps!

In this post I will share the code to summarize a news article using Python's Natural Language Toolkit (NLTK)

For this example I'll be extracting an article from The Hindu using BeautifulSoup and summarize the article using word frequency distribution.

import requests
from bs4 import BeautifulSoup
from nltk.tokenize import …

I will show how to progressively add new rows to the table as the last row is being edited in Angular

In, app.component.html

<table class="progressive-table">
    <thead>
        <tr>
            <th>KEY</th>
            <th>VALUE</th>
            <th></th>
        </tr>
    </thead>
    <tbody>
    <tr *ngFor="let pair of pairs; let idx = index …

Detailed problem statement can be found here Gambler's Ruin

General solution to the problem is;

$1- a_1 = a_1 \sum\limits_{i = 1}^{k-1} \left(\frac{1 - p}{p}\right)^i$

For a fair game of $p = \frac{1}{2}$, $a_1 = \frac{1}{k}$

and, for an unfair game of $p …

f-strings is a short for "formatted strings", provides a convenient way to embed expressions inside string literals. This supports more formatting options than the old str.format() method supports.

Few examples;

String operation

>>> name = 'Arunkumar'
>>> f'My name is {name.upper()}'
'My name is ARUNKUMAR'

Float formatting

>>> import math
>>> f …

While uploading files to AWS S3 using Python Boto3 library, it would by default set the content-type as binary. Below snippet would set the appropriate content type based on the file extension.

import mimetypes
...
file_mime_type, _ = mimetypes.guess_type(filename)
...
bucket_obj.upload_file(local_path, s3_path, ExtraArgs={'ContentType': file_mime_type})
...

The above snippet would …

AWS CLI is a command line tool used for interacting with AWS services.

In this post, I'll share the command to sync your local files to S3 bucket by removing files in the bucket that are not present in the local folder.

$ aws s3 sync . s3://bucket-name --delete

--delete option …

AWS Cognito provides authentication, authorization, and user management for your webapps. In this article I will show Angular snippets to perform authentication with AWS Cognito credentials.

First, I'll show the CognitoService class with just signIn functionality. I've removed other operations like register, confirm registration, etc. from the snippet for simplicity …

AWS Lambda is a compute service that lets you run code without provisioning or managing servers. In this article I will show how to create and manage simple AWS Lambda function written in Python.

Create files and folders as shown below. Technically, app.py is sufficient to create a function …