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 2 years, 10 months ago )
Bio: Loves to code.
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rajan published an article Dec. 19, 2020 ⋅ 500 views |
How to install Python libraries without using the pip command ?
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rajan published an article Aug. 11, 2020 ⋅ 468 views |
How to return JSON Encoded response from Django View
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rajan published an article Aug. 12, 2020 ⋅ 448 views |
How to separate Django application config files from code using python decouple
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rajan published an article April 20, 2020 ⋅ 904 views |
Advanced python concepts the easy way ( Lambda , Map and Filter )
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rajan published an article April 3, 2020 ⋅ 1446 views |
How to upload file to SQL server using pyodbc python
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rajan published an article April 18, 2020 ⋅ 1066 views |
Using advanced Python concepts the easy way ( List comprehensions and Slicing )
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rajan published an article March 27, 2020 ⋅ 1165 views |
Building a news headlines player using Python and text to speech
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rajan published an article Aug. 10, 2020 ⋅ 923 views |
Google off campus drive 2020 for India location
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rajan published an article Aug. 2, 2020 ⋅ 759 views |
7 Data Science project ideas you can work on to stand out
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rajan published an article April 17, 2020 ⋅ 809 views |
Building a simple To Do list app using HTML CSS Javascript
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rajan published an article Aug. 30, 2020 (Updated Aug. 30, 2020) ⋅ 509 views |
5 Analytical skills you must acquire as a data scientist
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rajan published an article July 21, 2020 (Updated July 21, 2020) ⋅ 611 views |
Handling Exceptions in Python
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rajan published an article May 24, 2020 (Updated May 24, 2020) ⋅ 864 views |
Automating backup of PostgreSQL database
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rajan published an article May 16, 2020 (Updated May 16, 2020) ⋅ 1631 views |
Building Instagram Profile pic downloader in python
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rajan published an article April 28, 2020 (Updated April 28, 2020) ⋅ 949 views |
Iteration Protocol and Generators in Python
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rajan published an article April 15, 2020 (Updated April 15, 2020) ⋅ 660 views |
Why python is so popular despite being slow ?
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rajan published an article April 4, 2020 (Updated April 6, 2020) ⋅ 540 views |
How to redirect using javascript
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rajan published an article March 29, 2020 (Updated March 30, 2020) ⋅ 2072 views |
How to prepare for Hack With Infy 2020
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rajan published an article March 22, 2020 (Updated March 24, 2020) ⋅ 2049 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) ⋅ 397 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) ⋅ 309 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) ⋅ 12627 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) ⋅ 402 views |
Find Length of a Linked List
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rajan published an article Jan. 23, 2020 (Updated Jan. 8, 2020) ⋅ 518 views |
Sort string of characters C++
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rajan published an article Jan. 23, 2020 (Updated Jan. 8, 2020) ⋅ 364 views |
Print a matrix in spiral form
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rajan published an article Jan. 23, 2020 (Updated Jan. 6, 2020) ⋅ 362 views |
Print reverse of a string using recursion
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rajan published an article Jan. 23, 2020 (Updated Jan. 5, 2020) ⋅ 2175 views |
Amazon Product Price tracking using Python
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rajan published an article Jan. 23, 2020 (Updated Jan. 3, 2020) ⋅ 329 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) ⋅ 405 views |
Generate QR Code using python with pyqrcode module
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rajan published an article Jan. 23, 2020 (Updated Dec. 27, 2019) ⋅ 1355 views |
Mouse and keyboard automation using Python
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rajan published an article Jan. 23, 2020 (Updated Dec. 26, 2019) ⋅ 294 views |
C++ Trigonometric functions
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rajan published an article Jan. 23, 2020 (Updated Dec. 26, 2019) ⋅ 343 views |
Remove one element to maximize XOR of array
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rajan published an article Jan. 23, 2020 (Updated Dec. 6, 2019) ⋅ 375 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) ⋅ 419 views |
C++ Hacks for Competitive programming
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rajan published an article Jan. 23, 2020 (Updated Nov. 21, 2019) ⋅ 687 views |
Add two numbers without using arithmetic operators
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rajan published an article Jan. 23, 2020 (Updated Nov. 19, 2019) ⋅ 866 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) ⋅ 776 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) ⋅ 625 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) ⋅ 1243 views |
Implement a Dictionary using Trie
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rajan published an article Jan. 23, 2020 (Updated Oct. 19, 2019) ⋅ 5770 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) ⋅ 273 views |
HackersFriend Graduated from Y Combinator's Startup School
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rajan published an article Jan. 23, 2020 (Updated Aug. 17, 2019) ⋅ 340 views |
Find maximum occurring character in a string
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rajan published an article Jan. 23, 2020 (Updated Aug. 16, 2019) ⋅ 1389 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) ⋅ 421 views |
What is Binary Search Tree (BST) ?
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rajan published an article Jan. 23, 2020 (Updated Aug. 13, 2019) ⋅ 483 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) ⋅ 3143 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) ⋅ 1076 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) ⋅ 2070 views |
Getting real time currency exchange rate using Python
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rajan published an article Jan. 23, 2020 (Updated July 23, 2019) ⋅ 343 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) ⋅ 571 views |
Django optimizing Database queries
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rajan published an article Jan. 23, 2020 (Updated July 16, 2019) ⋅ 3331 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) ⋅ 2586 views |
Count duplicates in a given linked list
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rajan published an article Jan. 23, 2020 (Updated July 13, 2019) ⋅ 441 views |
Function Pointers in C++
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rajan published an article Jan. 23, 2020 (Updated July 12, 2019) ⋅ 1031 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) ⋅ 3273 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) ⋅ 330 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) ⋅ 384 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) ⋅ 437 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) ⋅ 300 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) ⋅ 285 views |
Top 5 Tv shows Programmers must watch