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← Introduction to JavaScript
○What is JavaScript?○Your First JavaScript Code○Data Types○Type Checking
○Declaring Variables○let and const in Practice○Operators○Type Conversion
○Conditionals○Switch Statement○For Loops○While Loop○Break and Continue
○Defining Functions○Arrow Functions○Scope○Closures○Project - Calculator○Function Expressions
○Arrays○Array Mutation Methods○Array Search and Slice○Array Iteration Methods○Multidimensional Arrays○Destructuring○Array Reverse and Sort●Array Fill○Array Find and Includes○Array Flat and FlatMap○Array Reduce, Some, and Every
○Objects○Object Methods and Destructuring○JSON○Math and Date○Date Basics
○02 Template Literals○String Methods○Regular Expressions
○Higher-Order Functions○Callbacks○map, filter, and reduce○Recursion○Project - Data Transform Pipeline
○OOP Introduction○Classes○Inheritance○Encapsulation
○Asynchronous JavaScript○Promises and Async Await○Async API Simulation

Array Fill

The fill() method is small but useful. It lets learners replace a range of values in one step and makes a good transition from simple indexing to array methods.

Example

javascript
const seats = ['A', 'B', 'C', 'D', 'E'];
const filledSeats = [...seats].fill('X', 1, 4);

Your Task

  1. Create filledSeats from ['A', 'B', 'C', 'D', 'E'] so the middle three values become X.
  2. Display ["A","X","X","X","E"] in #output.
Hint 1
1 / 2
HINT 1

Use fill(value, start, end) to replace only part of the array.

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