Articles by Olorunfemi Akinlua

Linux Howtos

1. How to Count Files in Directory in Bash
2. How to Count Unique Lines in a File in Linux
3. How to Create a Progress Bar in Bash
4. How to Get Yesterday's Date in Linux
5. How to Remove Duplicate Lines in Bash
6. How to Remove First Character From String in Bash
7. How to Return an Array in Bash
8. Pattern Matching in Bash
9. How to Check if Input Argument Exists in Bash
10. How to Solve Error: Make Command Not Found on Cygwin
11. How to Solve Nodemon Command Not Found
12. How to Solve R Command Not Found on Bash (Or Cygwin)

Python Pandas Howtos

1. How to Explode Multiple Columns in Pandas
2. Alternative to the TimeGrouper Function in Pandas
3. How to Add Column With a Constant Value in Pandas
4. How to Calculate the Rolling Standard Deviation in Pandas
5. How to Check if a Cell Is Empty in Pandas
6. How to Multiply Matrix in Pandas
7. How to Multiply Columns by a Scalar in Pandas
8. How to Read Specific Rows From CSV in Pandas

Python How-To's

1. How to Change File Permissions in Python
2. How to Check if Element Exists Using Selenium Python
3. How to Create Defaultdict of Defaultdict in Python
4. How to Get All Keys in Redis Database With Python
5. How to Install Egg File in Python
6. How to Parse ISO 8601 Date in Python
7. How to Use Await in a Python Lambda
8. How to Use Circular List in Python
9. How to Create SFTP Functionality in Python
10. How to Create N-Grams From Text in Python
11. How to Retry a Loop in Python
12. How to Set Up SFTP Server on Windows
13. How to Switch Between Python 2 and 3
14. How to Set HTTP Proxy Settings in Python
15. How to Use Python Decorators to Retry Code Blocks
16. How to Create Getter and Setter in Python
17. How to Fix Fatal Python Error: PyThreadState_Get: No Current Thread
18. How to Fix TypeError: Must Be Real Number, Not STR
19. How to Manage Segmentation Fault in Python
20. How to Validate Email Address in Python
21. How to Solve AttributeError: 'list' Object Attribute 'append' Is Read-Only
22. How to Solve Configure: Error: No Acceptable C Compiler Found in $PATH
23. How to Solve IndexError: Arrays Used as Indices Must Be of Integer (Or Boolean) Type
24. How to Solve ModuleNotFoundError in Python
25. How to Solve Urllib HTTP Error 403 Forbidden Message in Python
26. How to Solve Attempted Relative Import With No Known Parent Package in Python
27. How to Solve Error - Raise JSONDecodeError(Expecting Value, S, err.value) From None in Python
28. How to Solve Reduce Is Not Defined in Python
29. How to Solve the Graphviz Executables Are Not Found Error in Python
30. How to Solve ValueError: Too Many Values to Unpack (Expected 2) in Python Dictionaries

PHP Howtos

1. How to Find the PHP Ini File
2. How to Parse RSS and Atom Feeds With PHP
3. How to Convert CSV File to Array in PHP
4. How to Log Errors in PHP
5. How to Upload Multiple Images in PHP
6. How to Use jQuery in PHP
7. How to Hash Password in PHP
8. How to Obtain and Read Data in PHP
9. How to Set Up a PHP Interpreter
10. How to Use PHP With Visual Studio Code
11. How to Parse HTML in PHP
12. this and self in PHP
13. How to Run PHP File From Command Line
14. How to Calculate Average of Numbers in PHP
15. How to Echo Tab in PHP
16. How to Include Absolute and Relative Paths in PHP
17. How to Require_once vs Include in PHP
18. How to Work With DatePicker in PHP
19. cURL GET Request Using PHP
20. How to Add Array to Array in PHP
21. How to Break Out of the Foreach Loop in PHP
22. How to Compare Two Arrays in PHP
23. How to Convert a Number to Month Name in PHP