Rajan Kumar
Founder at HackersFriend
India
Python, HTML, CSS, Django, JavaScript, Competitive programming
https://www.hackersfriend.com
@rajan ( Joined 6 years, 1 month ago )
Bio: Rajan is Founder of HackersFriend.
|
RK |
rajan published an article Aug. 11, 2020 ⋅ 2675 views |
How to return JSON Encoded response from Django View
|
RK |
rajan published an article April 20, 2020 ⋅ 2114 views |
Advanced python concepts the easy way ( Lambda , Map and Filter )
|
RK |
rajan published an article July 10, 2023 ⋅ 2216 views |
Designing DB schema for efficient pagination
|
RK |
rajan published an article May 9, 2022 ⋅ 2499 views |
Leaky Bucket algorithm for Rate limiting system design
|
RK |
rajan published an article July 9, 2022 ⋅ 1655 views |
Most common mistakes you should avoid in interviews
|
RK |
rajan published an article April 17, 2020 ⋅ 2822 views |
Building a simple To Do list app using HTML CSS Javascript
|
RK |
rajan published an article Aug. 12, 2020 ⋅ 1910 views |
How to separate Django application config files from code using python decouple
|
RK |
rajan published an article Aug. 2, 2020 ⋅ 1954 views |
7 Data Science project ideas you can work on to stand out
|
RK |
rajan published an article Jan. 20, 2023 ⋅ 2030 views |
Python - check if a path is file or directory
|
RK |
rajan published an article Aug. 10, 2020 ⋅ 1772 views |
Google off campus drive 2020 for India location
|
RK |
rajan published an article April 3, 2020 ⋅ 6649 views |
How to upload file to SQL server using pyodbc python
|
RK |
rajan published an article Dec. 19, 2020 ⋅ 37397 views |
How to install Python libraries without using the pip command ?
|
RK |
rajan published an article July 10, 2022 ⋅ 2167 views |
How to present your software engineering projects
|
RK |
rajan published an article March 27, 2020 ⋅ 2935 views |
Building a news headlines player using Python and text to speech
|
RK |
rajan published an article April 18, 2020 ⋅ 2146 views |
Using advanced Python concepts the easy way ( List comprehensions and Slicing )
|
RK |
rajan published an article July 4, 2023 (Updated July 4, 2023) ⋅ 1993 views |
Embedding agility in software developments
|
RK |
rajan published an article Jan. 20, 2023 (Updated Jan. 20, 2023) ⋅ 2439 views |
Python - Raise an exception with message
|
RK |
rajan published an article April 28, 2022 (Updated April 24, 2022) ⋅ 2737 views |
How to format date output in Linux bash script
|
RK |
rajan published an article Aug. 30, 2020 (Updated Aug. 30, 2020) ⋅ 1864 views |
5 Analytical skills you must acquire as a data scientist
|
RK |
rajan published an article July 21, 2020 (Updated July 21, 2020) ⋅ 1724 views |
Handling Exceptions in Python
|
RK |
rajan published an article May 24, 2020 (Updated May 24, 2020) ⋅ 2201 views |
Automating backup of PostgreSQL database
|
RK |
rajan published an article May 16, 2020 (Updated May 16, 2020) ⋅ 4902 views |
Building Instagram Profile pic downloader in python
|
RK |
rajan published an article April 28, 2020 (Updated April 28, 2020) ⋅ 2026 views |
Iteration Protocol and Generators in Python
|
RK |
rajan published an article April 15, 2020 (Updated April 15, 2020) ⋅ 1565 views |
Why python is so popular despite being slow ?
|
RK |
rajan published an article April 4, 2020 (Updated April 6, 2020) ⋅ 1514 views |
How to redirect using javascript
|
RK |
rajan published an article March 29, 2020 (Updated March 30, 2020) ⋅ 3123 views |
How to prepare for Hack With Infy 2020
|
RK |
rajan published an article March 22, 2020 (Updated March 24, 2020) ⋅ 11112 views |
Filtering empty or NULL values in a Django queryset
|
RK |
rajan published an article Jan. 25, 2020 (Updated March 9, 2020) ⋅ 1321 views |
forEach() Vs map() in JavaScript - Things every developer should know
|
RK |
rajan published an article Jan. 23, 2020 (Updated Jan. 16, 2020) ⋅ 1367 views |
Convert a number to a string in C - best way
|
RK |
rajan published an article Jan. 23, 2020 (Updated Jan. 12, 2020) ⋅ 26328 views |
Building news aggregator web app with Django using python web scraping
|
RK |
rajan published an article Jan. 23, 2020 (Updated Jan. 8, 2020) ⋅ 1368 views |
Find Length of a Linked List
|
RK |
rajan published an article Jan. 23, 2020 (Updated Jan. 8, 2020) ⋅ 2291 views |
Sort string of characters C++
|
RK |
rajan published an article Jan. 23, 2020 (Updated Jan. 8, 2020) ⋅ 1239 views |
Print a matrix in spiral form
|
RK |
rajan published an article Jan. 23, 2020 (Updated Jan. 6, 2020) ⋅ 1263 views |
Print reverse of a string using recursion
|
RK |
rajan published an article Jan. 23, 2020 (Updated Jan. 5, 2020) ⋅ 3987 views |
Amazon Product Price tracking using Python
|
RK |
rajan published an article Jan. 23, 2020 (Updated Jan. 3, 2020) ⋅ 1440 views |
Program to find the mid-point of a line
|
RK |
rajan published an article Jan. 23, 2020 (Updated Jan. 3, 2020) ⋅ 1770 views |
Generate QR Code using python with pyqrcode module
|
RK |
rajan published an article Jan. 23, 2020 (Updated Dec. 27, 2019) ⋅ 5248 views |
Mouse and keyboard automation using Python
|
RK |
rajan published an article Jan. 23, 2020 (Updated Dec. 26, 2019) ⋅ 1038 views |
C++ Trigonometric functions
|
RK |
rajan published an article Jan. 23, 2020 (Updated Dec. 26, 2019) ⋅ 1873 views |
Remove one element to maximize XOR of array
|
RK |
rajan published an article Jan. 23, 2020 (Updated Dec. 6, 2019) ⋅ 1091 views |
Algorithms and Maths you need to know for hard level competitive programming problems
|
RK |
rajan published an article Jan. 23, 2020 (Updated Dec. 2, 2019) ⋅ 1213 views |
C++ Hacks for Competitive programming
|
RK |
rajan published an article Jan. 23, 2020 (Updated Nov. 21, 2019) ⋅ 2239 views |
Add two numbers without using arithmetic operators
|
RK |
rajan published an article Jan. 23, 2020 (Updated Nov. 19, 2019) ⋅ 2660 views |
Efficient Method to Check if a Number is Multiple of 3
|
RK |
rajan published an article Jan. 23, 2020 (Updated Nov. 18, 2019) ⋅ 1791 views |
DNA to Protein Converter using Python 3 and Django 2.1
|
RK |
rajan published an article Jan. 23, 2020 (Updated Nov. 16, 2019) ⋅ 1858 views |
Step by step guide to improve competitive programming skills
|
RK |
rajan published an article Jan. 23, 2020 (Updated Nov. 13, 2019) ⋅ 2911 views |
Implement a Dictionary using Trie
|
RK |
rajan published an article Jan. 23, 2020 (Updated Oct. 19, 2019) ⋅ 8920 views |
How to prepare for Google Kickstart – a CodeJam competition?
|
RK |
rajan published an article Jan. 23, 2020 (Updated Sept. 28, 2019) ⋅ 949 views |
HackersFriend Graduated from Y Combinator's Startup School
|
RK |
rajan published an article Jan. 23, 2020 (Updated Aug. 17, 2019) ⋅ 1152 views |
Find maximum occurring character in a string
|
RK |
rajan published an article Jan. 23, 2020 (Updated Aug. 16, 2019) ⋅ 3017 views |
Sort an array without changing position of negative numbers
|
RK |
rajan published an article Jan. 23, 2020 (Updated Aug. 14, 2019) ⋅ 1471 views |
What is Binary Search Tree (BST) ?
|
RK |
rajan published an article Jan. 23, 2020 (Updated Aug. 13, 2019) ⋅ 1504 views |
Merge two Binary search Trees with constant extra space
|
RK |
rajan published an article Jan. 23, 2020 (Updated Aug. 2, 2019) ⋅ 6444 views |
How to generate OTP (One time password) using python
|
RK |
rajan published an article Jan. 23, 2020 (Updated July 25, 2019) ⋅ 2580 views |
Get current weather of any city with python using openweathermap API
|
RK |
rajan published an article Jan. 23, 2020 (Updated July 25, 2019) ⋅ 4029 views |
Getting real time currency exchange rate using Python
|
RK |
rajan published an article Jan. 23, 2020 (Updated July 23, 2019) ⋅ 1065 views |
Find prime numbers in the first half and second half of an array
|
RK |
rajan published an article Jan. 23, 2020 (Updated July 18, 2019) ⋅ 1873 views |
Django optimizing Database queries
|
RK |
rajan published an article Jan. 23, 2020 (Updated July 16, 2019) ⋅ 6197 views |
Check whether two strings contain same characters in same order
|
RK |
rajan published an article Jan. 23, 2020 (Updated July 16, 2019) ⋅ 6223 views |
Count duplicates in a given linked list
|
RK |
rajan published an article Jan. 23, 2020 (Updated July 13, 2019) ⋅ 2079 views |
Function Pointers in C++
|
RK |
rajan published an article Jan. 23, 2020 (Updated July 12, 2019) ⋅ 4516 views |
Remove an element to maximize the GCD of a given array
|
RK |
rajan published an article Jan. 23, 2020 (Updated July 9, 2019) ⋅ 7799 views |
Find Sum of all Submatrices of a Given Matrix
|
RK |
rajan published an article Jan. 23, 2020 (Updated June 6, 2019) ⋅ 1145 views |
Length of longest sub-array with maximum arithmetic mean
|
RK |
rajan published an article Jan. 23, 2020 (Updated May 29, 2019) ⋅ 1304 views |
Learn Full stack development from scratch part - 1 ( step by step guide )
|
RK |
rajan published an article Jan. 23, 2020 (Updated Jan. 23, 2019) ⋅ 1413 views |
Shuffle elements of an Array most efficient way , Fisher Yates shuffle algorithm
|
RK |
rajan published an article Jan. 23, 2020 (Updated Jan. 21, 2019) ⋅ 1058 views |
Top 10 jobs that will have high demand in future
|
RK |
rajan published an article Jan. 23, 2020 (Updated Jan. 21, 2019) ⋅ 1009 views |
Top 5 Tv shows Programmers must watch