santattech

Why Use Ruby on Rails (v8) for the New Internal Application and Why Upgrade the Existing Rails 7 App

Pros

Benefits	Explanation
Fast development and lower cost	Rails’ conventions, scaffolding, and ActiveAdmin (for internal dashboards) drastically reduce development time and maintenance cost
Proven framework with longeivity	Mature, stable, and backed by an active community, ensuring long-term support.
Secure by default	Rails 8 provides better encryption, session handling and security patches continuously
Rich ecosystem	Rich ecosystem for authentication (Devise), authorization (Pundit), and admin dashboards (ActiveAdmin)

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import 'dart:convert';
import 'dart:core';

void main() {
  var json = {
    'data': [
      {'id': 1, 'attributes': {'name': "Ram"}}, {'id': 2, 'attributes': {'name': "Shyam"}}
    ]
  };

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Postgres collation version issue

What is PG collation?

A collation is an SQL schema object that maps an SQL name to operating system locales. A collation specifies the bit patterns that represent each character in a dataset and determine the rules used to sort and compare data. Collation attributes can have an impact on query results because they govern how sorting and comparison operations function.

How do I get collation in PostgreSQL?

To find the collation of the database, you need to query pg_database : select datname, datcollate from pg_database;

What was the error?

Recently I have updated my OS version from Ubunutu 20 to Ubuntu 22. After that whenever I tried to create a database in my Postgresql, it throws error. Below is the error shown:

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Few important links

Install Ubuntu on WSL2 on Windows 10

https://ubuntu.com/tutorials/install-ubuntu-on-wsl2-on-windows-10#2-install-wsl

username: santattech
password: 123456

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Error

running the docker command with sudo giving error from docker volume, like permission denied uninstall docker install docker follow post install steps https://docs.docker.com/engine/install/ubuntu/#uninstall-old-versions https://docs.docker.com/engine/install/linux-postinstall/

steps so far

1. netgear + vpn

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Basic Interview Questions

C

• What is data type in C?
• What is sizeOf function in C?
• What is syntax of ternary operator in C?
• Difference between = and ==
• What is pointer?
• What is NULL pointer?