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JavaScript Fundamentals · JavaScript Objects, Arrays and Array Methods (map, filter, reduce)

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Stop 1 of 5 · Warehouse aisle: sorting the shelf

Trick to keep in mind+3 XP

Bare sort() sorts as text: compare by letters, not by size

With no comparator, sort turns items into strings and orders them character by character, like a dictionary. Under that rule "100" sorts before "25" because "1" comes before "2". For real numeric order pass (a, b) => a - b.

console.log([25, 3, 100].sort());
console.log([25, 3, 100].sort((a, b) => a - b));

Read it once, then a question tests whether the trick stuck.