Web Development / JavaScript
Lesson 19 of 30
Arrays and objects
Arrays are lists, objects are like Python dictionaries. map, filter and find are the methods you'll use most.
Key points
- arr.filter keeps matches
- arr.find gets the first match
- obj.key or obj["key"]
const users = [{name: "ali", xp: 40}, {name: "sara", xp: 90}];
const pros = users.filter(u => u.xp > 50);Quiz · +10 XP
Which array method keeps only items that match a test?
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