Coding Challenges
Explore our collection of coding challenges and practice questions. Filter by topic, difficulty, and more to find the perfect challenges for your learning journey.
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Arrays
What does the HTTP status code '302' mean?
Beginner
HttpHttp codesStatus codes
What does the HTTP status code '403' mean?
Beginner
HttpHttp codesStatus codes
What are HTTP status codes?
Beginner
HttpHttp codesStatus codes
Why are HTTP status codes important?
Beginner
HttpHttp codesStatus codes
JavaScript Array Chaining: Understanding map, filter, and reduce with Initial Value
Medium
ArraysJavascriptMap+2
Count the Occurrences of Elements in an Array
Medium
JavascriptArraysReduce+2
Sum All Numbers in an Array
Easy
JavascriptArraysReduce
How to Implement Persistent Watch History in JavaScript Using localStorage
Medium
LocalstorageJsonBrowser storage+1
Implementing Debounced Auto-Save in a Real-Time Collaborative Document Editor
Hard
ApiDebounceSettimeout+1
Calculate Shopping Cart Total with Multiple Discount Types using JavaScript Reduce Method
Medium
ArraysReduceE commerce
Fixing Race Conditions and Error Handling in Async Notification Queue System
Hard
ConcurrencyError handlingAsync programming+1
How to Group and Calculate Daily Averages from Time Series Data using JavaScript Reduce
Medium
ReduceDate manipulationData transformation+1
Implementing Case-Insensitive Product Search with Name, Description and Tags in JavaScript
Medium
ArraysSearchStrings+1
React: Implementing Image Loading States and Error Handling in Product Card Component
Easy
ReactUseeffectImages+1
How to Fix Form Validation That Doesn't Stop at First Error in JavaScript
Medium
ArraysObjectsError handling+1