nodejs Archives | Madhurendra Sachan

Kindle Universal Dashboard

September 17, 2019October 30, 2016 by Madhurendra

Kindle is Super awesome ! Because of its e-ink display. I wanted a display to present data which has – Least power consumption, Not painful to eyes & obviously one which doesn’t emit blue light. E-Ink displays fit perfectly to my requirement – acquiring a display which can be driven using Raspberry Pi or Arduino is hard, … Read more

NodeJs – Improving performance using native binding

March 18, 2016 by Madhurendra

This is known fact that javascript is really slow in terms of sync operations like multiplications, divisions etc. – Since nodejs is based on js – Node inherits the curse. Check http://benchmarksgame.alioth.debian.org/u64/compare.php?lang=v8&lang2=gpp this article to cross check the fact. Nodejs is fast in some aspects. I love it 😛 Doesn’t matter how much you improve … Read more

Optimal way of scheduling long job – nodejs/js

January 29, 2016 by Madhurendra

If you are using nodejs for some backend stuff to schedule some-work, probably you will hate scheduling because of two factors You can’t set long timeout Timers are removed when process restart You would probably favor cronjobs for scheduling – or may be polling database for regular interval. Loading nodejs script every 5min is a … Read more

Converting Opensource Dictionary to JSON

November 23, 2015November 23, 2015 by Madhurendra

Folddoc provide free online computer dictionary but they don’t have any standard tool or format to import dictionary in database or so. Dictionary can be downloaded form http://foldoc.org/Dictionary.txt Run the following nodejs code it will dump dictionary to OUTPUT.json and don’t forget to remove initial lines of disclaimer or they will add to your dictionary. … Read more

Importing large CSV file to Mongo.

November 2, 2016November 18, 2015 by Madhurendra

Someday you will need to import a large file to mongo or some other DBMS ,
You start writing code for achieving same using NodeJS, but when you run memory usage start increasing and either core of your CPU is at 100%.