TILs - Fueling Curiosity, One Insight at a Time

At Codemancers, we believe every day is an opportunity to grow. This section is where our team shares bite-sized discoveries, technical breakthroughs and fascinating nuggets of wisdom we've stumbled upon in our work.

Published
Author
user-image
Adithya Hebbar
System Analyst
util.inspect use-case:

• Without util.inspect

JavaScript

const obj = {
  name: "Adi",
  age: 24,
  details: { details1: { details2: { hobbies: "travelling" } } },
};
console.log(obj);
//Output: { name: 'Alice', age: 30, details: { details1: { details2: [Object] } } }


• With util.inspect

Code

import util from "util";

const obj = {
  name: "Adi",
  age: 24,
  details: { details1: { details2: { hobbies: "travelling" } } },
};

console.log(util.inspect(obj, { depth: null, colors: true }));

//Output: { name: 'Adi', age: 24, details: { details1: { details2: { hobbies: 'travelling' } } } }


console.log doesn't show all details of complex objects, especially nested ones or hidden properties. util.inspect gives a complete and customizable view for better debugging and understanding.

#javascript
Published
Author
user-image
Adithya Hebbar
System Analyst
To kill a process running on a specific port in mac:
1. lsof -i :<port_number>
2. Note the PID of the process from the output.
3. kill -9 <pid>
#killprocess
Published
Author
user-image
Ayush Srivastava
System Analyst
Password recovery command for Influxdb when running in local as the UI does not provide any other way to set a new password if you have forgotten


Code

influxd recovery user update \
  --username example-username \
  --password ExAmPL3-paS5W0rD


#influxdb
Published
Author
user-image
Ayush Srivastava
System Analyst
Uninstall / remove a Homebrew package including all its dependencies


Code

brew tap ggpeti/rmrec
brew rmrec pkgname


#homebrew
Published
Author
user-image
Nisanth
Terminating a AWS EC2 Instance #devops #aws

If the Instance is no longer in use and has been stopped, it is necessary to proceed with terminate the Instance. This step ensures that we free up resources, reduce potential security risks, and maintain a clean and efficient infrastructure.

Checklist:
1. Take a Snapshot of the EBS Volume:
◦ It is best practice to take a snapshot of the EBS volume as a backup before decommissioning the service.
2. Verify Terraform Management:
◦ Check if the service is managed by Terraform.
3. Terminate the Instance
Published
Author
user-image
Nisanth
Restarting a DaemonSet in Kubernetes #devops #kubernetes

To find a DaemonSet in a specific namespace:

Code

kubectl get ds -n


To restart the DaemonSet:


Code

kubectl rollout restart ds  -n

Published
Author
user-image
Sujay
Log shipping is a process used in database management to automate the backup and restoration of transaction logs (history of every action) from a primary database server to a secondary standby server. The main purpose of log shipping is to provide a disaster recovery solution, ensuring data availability and integrity in case of a primary server failure
#db
Published
Author
user-image
Vaibhav Yadav
Senior System Analyst
Recently I came across an interesting use case of combining CSS variables with environment variables. The challenge was to change a CSS property, particularly a color, based on an environment variable. Since CSS doesn't support environment variables directly, here's the approach I took:

The global css file:

Code

:root {
  /* ----- fallback value ----- */
  --primary-color: #3498db;
}

h1 {
  color: var(--primary-color);
}


Then, in our React application:

Code

const App = () => {
  const primaryColor = process.env.NAME === 'a' ? '#fff' : '#000';

  return (
    <div style={{ '--primary-color': primaryColor }}>
      <h1>Hello, World!</h1>
    </div>
  );
};


#css #cssvariables #react
Published
Author
user-image
Vaibhav Yadav
Senior System Analyst
Using choice Input in GitHub Actions

Choice input in Github actions can be used to provide a predefined list of options for workflow dispatch events. This makes it easier for users to select from a set of valid options when triggering workflows manually.

Example:


Code

name: Example Workflow

on:
  workflow_dispatch:
    inputs:
      environment:
        description: 'Select the environment'
        required: true
        default: 'sandbox'
        type: choice
        options:
          - sandbox
          - uat
          - production

jobs:
  example_job:
    runs-on: ubuntu-latest
    steps:
      - name: Display Inputs
        run: |
          echo "Environment: ${{ github.event.inputs.environment }}"


#githubactions #devops #automation #dropdown
Published
Author
user-image
Adithya Hebbar
System Analyst
To generate an Entity-Relationship Diagram (ERD) using Prisma-erd-generator, follow these steps :
• Install the following package

JavaScript

npm i -D prisma-erd-generator @mermaid-js/mermaid-cli
# or
yarn add -D prisma-erd-generator @mermaid-js/mermaid-cli


• Add this to your schema.prisma

Code

generator erd {
  provider = "prisma-erd-generator"
}


• Run the generator

Code

npx prisma generate


#javascript #erd

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