BitWithBite
JavaScript Worksheet
⚡ Arrays
SCORE___ / 20
NameClassDate
After this worksheet you can
Create/index arrayspush/pop/shiftmap and filterFind array length📚 Quick Recap
🎯 What you'll learn: How to create and manipulate arrays in JavaScript — from basics like push/pop to powerful functional methods like map, filter, and reduce. You'll also cover destructuring, spread, sorting, and build real examples like a shopping cart.
🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4
1[10,20,30][1] is:
2Add to the end with:
3[1,2,3].map(x=>x*2) gives:
4filter returns:
🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11
5arr.() removes the last item.
6[1,2,3].length = .
7Create an array of 3 colors.
8Double every number in [1,2,3].
9Keep only even numbers of [1..6].
🚀 Section C · Challenge ● CHALLENGE 5
10What does [1,2,3].pop() return and leave?
💭 Reflection — the most useful thing I learned:
A ___/4 B ___/11 C ___/5 Total ___/20
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✂ answer key — fold or cut before handing out
1-B 2-A 3-A 4-B | 5 pop 6 3 7 = const colors=['red','green','blue']; 8 = [1,2,3].map(n=>n*2) = [2,4,6] 9 = arr.filter(n=>n%2===0) = [2,4,6] | 10 = Returns 3; array becomes [1,2]