node js write large data to excel

In this sample I am using a node module called ‘ ExcelJS‘. This will stream the data to the file instead of big data in memory (if we are keeping large amount of data in memory, we may get JavaScript heap out of memory exception ) this will write to the file

Install the module using npm

then in the node application just import the module

we can use the same module in typescript also

refer : exceljs

By bm on October 18, 2018 | Uncategorized | A comment?

How to add Firebase Cloud Messaging into you app

Visit https://firebase.google.com/docs/cloud-messaging/android/client for more details

1) Create your app and add it as a project in firebase https://console.firebase.google.com/


2) Add your projects package name while creating the project



3) Download the google-services.json (will be downloaded automatically) and save it in your app module (while opening the project in project tab)


4) Add the classpath dependency in project level gradle and apply plugin dependency in app level gradle

  • classpath ‘com.google.gms:google-services:3.0.0’
  • apply plugin: ‘com.google.gms.google-services’

5) Add the firebase dependency for fcm to support cloud messaging

  • compile ‘com.google.firebase:firebase-messaging:9.0.2’



6) In your Manifest create two services which extend

  • FirebaseMessagingService – to receive message (override its onMessageReceived function to get the remote message)
  • FirebaseInstanceIdService – to refresh device token (override its onTokenRefresh function to get the new token)

Add these two services in your manifest

7) You can test notifications from the notification console of your app https://console.firebase.google.com/project/<YOUR_PROJECT_NAME_HERE>/notification


By sanket on June 28, 2016 | Uncategorized | A comment?

git repository setting and commands


GitHub is an online repository. Many people find it very confusing to use GitHub, so I’ve decided to share my experience of using it on Linux Ubuntu.
So in this post we will discuss:
1. How to set up and clone repo to your local machine avoiding message: Permission denied (publickey).
2. How to transfer all changes you are making INTO Github
3. How to get those changes FROM GitHub

My way could not be the most efficient one, but it works for me. :)
How to setup up GitHub to your local machine ?

So for the first part, you need to download Git and set your SSH key. Thanks to the GitHub documentation, step by step guide is here:
How to clone your repo to your local machine ?

(in git terminology it’s called “checkout“)

First you need to find your repo address. It can be find on your GitHub repo page:

Copy the address in the box ([email protected]……/….git)

Open the terminal and go to the folder where you want to have your git to be located.

Type command:


Here is my output:

How to transfer all changes you are making INTO Github ?

(in GitHub it is called Push)

There are 3 steps to transfer your changes to GitHub:

a. You need to add files —> git add .

(“.” means all the files, no worries, it will add everything that was changed.)

b. You need to Commit you changes –> git commit -m “Message you want to see near your commit”

c. Push your changes to the server –> git push

My output:

On the repo I now see that README file has my commit message (I changed only README.txt):

How to get those changes FROM GitHub ?

git checkout

git pull

These commands will bring all the new stuff from GitHub to your machine.



By bm on | Uncategorized | A comment?