How To List Every File in a Directory in Python
Use the ‘os’ library and filter() function
Archive
A collection of 182 issues
Latest
How To Check for a Substring in JavaScript
Learn to use .indexOf() and .includes()
How To Check for an Undefined/Null/Empty String
Determine what is valid and use duck-typing to check for all three
Three Ways to Check for a Value in an Array
Learn to use built-in array methods or your own loop
How To Use Lambda Expressions in Python
They may look scary at first but they’re pretty simple
How To Get the Last Item in a List in Python
Use slice notation and learn to safeguard your application
Use for…of to Loop Through Your JavaScript Arrays
A simpler way to iterate over arrays
Stop Using For Loops to Iterate Over Arrays
Start replacing your vanilla for loops with the .forEach() method
How To Convert Objects to Arrays and Vice Versa in JavaScript
Learn to use Object.entries() and Object.fromEntries()
Use the Walrus Operator to Assign and Print in One Line
My new favorite use of the walrus operator in Python