TypeScript tutorialLesson 7Free preview

TS Arrays

This lesson is part of TypeScript · All levels

Summary

The TypeScript array stores a set of values of the same type and is declared with a type pattern[]. Since the type is locked, adding different values will trigger compilation error. Readonly and union variants are also available for cases requiring flexibility.

Key points

Syntax array: number[] or Array
The array content must be according to the declaration type
The map/filter method produces a new array

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