Arrays and Objects: Shaping Data Like a Professional
map, filter, reduce and find, the four methods that replace almost every for loop you will ever write. Learn them on real data: a list of orders you have to filter, total up and render.
JavaScript
5 lessons
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Course Curriculum
5 lessons · 1 free preview · ~1.3h total
2
map: Turning Each Item Into Something Else
3
reduce: Boiling a List Down to One Value
4
find, some and includes: Asking Quick Questions
5
Project: A Sales Summary in Four Lines
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Course Includes
- 5 structured lessons
- Live coding playground
- Hints when you're stuck
- Automatic code checking
- Completion certificate
- Included with Plus
- Mobile friendly