Rajan Kumar
work Founder & Programmer at HackersFriend
location_on India
code Python, HTML, CSS, Django, JavaScript, Competitive programming
public https://www.hackersfriend.com
@rajan ( Joined 1 year, 9 months ago )
Bio: Loves to code.
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rajan published an article April 18, 2020 ⋅ 453 views |
Using advanced Python concepts the easy way ( List comprehensions and Slicing )
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rajan published an article March 27, 2020 ⋅ 387 views |
Building a news headlines player using Python and text to speech
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rajan published an article April 3, 2020 ⋅ 287 views |
How to upload file to SQL server using pyodbc python
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rajan published an article April 17, 2020 ⋅ 291 views |
Building a simple To Do list app using HTML CSS Javascript
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rajan published an article April 20, 2020 ⋅ 350 views |
Advanced python concepts the easy way ( Lambda , Map and Filter )
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rajan published an article May 24, 2020 (Updated May 24, 2020) ⋅ 133 views |
Automating backup of PostgreSQL database
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rajan published an article May 16, 2020 (Updated May 16, 2020) ⋅ 214 views |
Building Instagram Profile pic downloader in python
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rajan published an article April 28, 2020 (Updated April 28, 2020) ⋅ 337 views |
Iteration Protocol and Generators in Python
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rajan published an article April 15, 2020 (Updated April 15, 2020) ⋅ 296 views |
Why python is so popular despite being slow ?
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rajan published an article April 4, 2020 (Updated April 6, 2020) ⋅ 185 views |
How to redirect using javascript
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rajan published an article March 29, 2020 (Updated March 30, 2020) ⋅ 579 views |
How to prepare for Hack With Infy 2020
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rajan published an article March 22, 2020 (Updated March 24, 2020) ⋅ 205 views |
Filtering empty or NULL values in a Django queryset
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rajan published an article Jan. 25, 2020 (Updated March 9, 2020) ⋅ 106 views |
forEach() Vs map() in JavaScript - Things every developer should know
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rajan published an article Jan. 23, 2020 (Updated Jan. 16, 2020) ⋅ 58 views |
Convert a number to a string in C - best way
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rajan published an article Jan. 23, 2020 (Updated Jan. 12, 2020) ⋅ 1702 views |
Building news aggregator web app with Django using python web scraping
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rajan published an article Jan. 23, 2020 (Updated Jan. 8, 2020) ⋅ 99 views |
Find Length of a Linked List
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rajan published an article Jan. 23, 2020 (Updated Jan. 8, 2020) ⋅ 94 views |
Sort string of characters C++
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rajan published an article Jan. 23, 2020 (Updated Jan. 8, 2020) ⋅ 74 views |
Print a matrix in spiral form
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rajan published an article Jan. 23, 2020 (Updated Jan. 6, 2020) ⋅ 67 views |
Print reverse of a string using recursion
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rajan published an article Jan. 23, 2020 (Updated Jan. 5, 2020) ⋅ 454 views |
Amazon Product Price tracking using Python
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rajan published an article Jan. 23, 2020 (Updated Jan. 3, 2020) ⋅ 68 views |
Program to find the mid-point of a line
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rajan published an article Jan. 23, 2020 (Updated Jan. 3, 2020) ⋅ 77 views |
Generate QR Code using python with pyqrcode module
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rajan published an article Jan. 23, 2020 (Updated Dec. 27, 2019) ⋅ 184 views |
Mouse and keyboard automation using Python
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rajan published an article Jan. 23, 2020 (Updated Dec. 26, 2019) ⋅ 56 views |
C++ Trigonometric functions
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rajan published an article Jan. 23, 2020 (Updated Dec. 26, 2019) ⋅ 46 views |
Remove one element to maximize XOR of array
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rajan published an article Jan. 23, 2020 (Updated Dec. 6, 2019) ⋅ 90 views |
Algorithms and Maths you need to know for hard level competitive programming problems
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rajan published an article Jan. 23, 2020 (Updated Dec. 2, 2019) ⋅ 83 views |
C++ Hacks for Competitive programming
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rajan published an article Jan. 23, 2020 (Updated Nov. 21, 2019) ⋅ 91 views |
Add two numbers without using arithmetic operators
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rajan published an article Jan. 23, 2020 (Updated Nov. 19, 2019) ⋅ 100 views |
Efficient Method to Check if a Number is Multiple of 3
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rajan published an article Jan. 23, 2020 (Updated Nov. 18, 2019) ⋅ 159 views |
DNA to Protein Converter using Python 3 and Django 2.1
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rajan published an article Jan. 23, 2020 (Updated Nov. 16, 2019) ⋅ 107 views |
Step by step guide to improve competitive programming skills
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rajan published an article Jan. 23, 2020 (Updated Nov. 13, 2019) ⋅ 118 views |
Implement a Dictionary using Trie
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rajan published an article Jan. 23, 2020 (Updated Oct. 19, 2019) ⋅ 748 views |
How to prepare for Google Kickstart – a CodeJam competition?
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rajan published an article Jan. 23, 2020 (Updated Sept. 28, 2019) ⋅ 49 views |
HackersFriend Graduated from Y Combinator's Startup School
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rajan published an article Jan. 23, 2020 (Updated Aug. 17, 2019) ⋅ 82 views |
Find maximum occurring character in a string
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rajan published an article Jan. 23, 2020 (Updated Aug. 16, 2019) ⋅ 226 views |
Sort an array without changing position of negative numbers
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rajan published an article Jan. 23, 2020 (Updated Aug. 14, 2019) ⋅ 72 views |
What is Binary Search Tree (BST) ?
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rajan published an article Jan. 23, 2020 (Updated Aug. 13, 2019) ⋅ 78 views |
Merge two Binary search Trees with constant extra space
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rajan published an article Jan. 23, 2020 (Updated Aug. 2, 2019) ⋅ 366 views |
How to generate OTP (One time password) using python
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rajan published an article Jan. 23, 2020 (Updated July 25, 2019) ⋅ 110 views |
Get current weather of any city with python using openweathermap API
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rajan published an article Jan. 23, 2020 (Updated July 25, 2019) ⋅ 406 views |
Getting real time currency exchange rate using Python
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rajan published an article Jan. 23, 2020 (Updated July 23, 2019) ⋅ 69 views |
Find prime numbers in the first half and second half of an array
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rajan published an article Jan. 23, 2020 (Updated July 18, 2019) ⋅ 48 views |
Django optimizing Database queries
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rajan published an article Jan. 23, 2020 (Updated July 16, 2019) ⋅ 149 views |
Check whether two strings contain same characters in same order
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rajan published an article Jan. 23, 2020 (Updated July 16, 2019) ⋅ 295 views |
Count duplicates in a given linked list
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rajan published an article Jan. 23, 2020 (Updated July 13, 2019) ⋅ 93 views |
Function Pointers in C++
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rajan published an article Jan. 23, 2020 (Updated July 12, 2019) ⋅ 127 views |
Remove an element to maximize the GCD of a given array
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rajan published an article Jan. 23, 2020 (Updated July 9, 2019) ⋅ 206 views |
Find Sum of all Submatrices of a Given Matrix
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rajan published an article Jan. 23, 2020 (Updated June 6, 2019) ⋅ 55 views |
Length of longest sub-array with maximum arithmetic mean
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rajan published an article Jan. 23, 2020 (Updated May 29, 2019) ⋅ 84 views |
Learn Full stack development from scratch part - 1 ( step by step guide )
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rajan published an article Jan. 23, 2020 (Updated Jan. 23, 2019) ⋅ 73 views |
Shuffle elements of an Array most efficient way , Fisher Yates shuffle algorithm
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rajan published an article Jan. 23, 2020 (Updated Jan. 21, 2019) ⋅ 54 views |
Top 10 jobs that will have high demand in future
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rajan published an article Jan. 23, 2020 (Updated Jan. 21, 2019) ⋅ 80 views |
Top 5 Tv shows Programmers must watch