Previous Daily Questions
All daily questions that have been asked in the past.
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JavaScript: Find First Active User Over 30 with Orders Using Array Methods
Easy
Array methodsData filteringReal world applications+1
Check if a Number is a Multiple of Another Number
Beginner
JavascriptFunctionsConditionals+1
JavaScript: Understanding Chained Array Methods with Map, Filter, and Reduce Operations
Easy
JavascriptMapReduce+1
How to Add a Callback Function to Calculate Sum in JavaScript
Easy
FunctionsHigher order functionsCallbacks
JavaScript Array Chaining: Understanding map, filter, and reduce with Initial Value
Medium
JavascriptArraysMap+2
How to Implement Persistent Watch History in JavaScript Using localStorage
Medium
LocalstorageJsonClasses+1
Implementing Debounced Auto-Save in a Real-Time Collaborative Document Editor
Hard
DebounceAsync programmingSettimeout+1
Calculate Shopping Cart Total with Multiple Discount Types using JavaScript Reduce Method
Medium
ReduceArraysE commerce
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
SearchStringsArrays+1
How to Fix Form Validation That Doesn't Stop at First Error in JavaScript
Medium
ValidationObjectsArrays+1
How to Implement Cached Date Formatters with Multiple Locales in JavaScript
Medium
DatesInternationalizationCaching
Implementing Undo/Redo Functionality in a Document Editor Using Stack Data Structure
Medium
State managementData structures
How to Calculate Total Price of Shopping Cart Items Using JavaScript Array Reduce Method
Easy
ArraysReduceIteration
How to Correctly Update Counter State Using Previous State in React useState Hook
Easy
ReactUsestateReact hooks