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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 Search and Slice

Some array methods return new arrays instead of changing the original. This lesson uses slice() and concat() to practice that non-mutating pattern.

Example

javascript
const numbers = [1, 2, 3, 4, 5];
const middle = numbers.slice(1, 4);
const combined = middle.concat([10, 11]);

Your Task

  1. Create middleNumbers by slicing [1, 2, 3, 4, 5] so it contains [2, 3, 4].
  2. Create combinedNumbers by concatenating [10, 11] and display [2,3,4,10,11] in #output.
Hint 1
1 / 2
HINT 1

Use slice(1, 4) to get the middle three values from a five-item array.

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