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Programmation TypeScript
book

Programmation TypeScript

by Boris Cherny
November 2024
Intermediate to advanced
324 pages
8h 6m
French
O'Reilly Media, Inc.
Content preview from Programmation TypeScript

Annexe A. Opérateurs de type

TypeScript prend en charge un riche ensemble d'opérateurs de type pour travailler avec les types. Utilise le tableau A-1 comme référence pratique lorsque tu veux en savoir plus sur un opérateur.

Tableau A-1. Opérateurs de type
Opérateur de type Syntaxe Utilise-le sur En savoir plus

Requête de type

typeof, instanceof

N'importe quel type

"Raffinement", "Les classes déclarent à la fois des valeurs et des types".

Clés

keyof

Types d'objets

"La clé de l'opérateur"

Recherche de propriété

O[K]

Types d'objets

"L'opérateur de saisie"

Type mappé

[K in O]

Types d'objets

"Types mappés"

Ajout d'un modificateur

+

Types d'objets

"Types mappés"

Soustraction de modificateurs

-

Types d'objets

"Types mappés"

Modificateur en lecture seule

readonly

Types d'objets, types de tableaux, types de tuple

"Objets", "Classes et héritage", "Tableaux et tuples en lecture seule".

Modificateur facultatif

?

Types d'objets, types de tuple, types de paramètres de fonctions

"Objets", "Tuples", "Paramètres optionnels et par défaut".

Type conditionnel

?

Types génériques, alias de types, types de paramètres de fonctions

"Types conditionnels"

Nonnull assertion

!

Types annulables

"Assertions non nulles", "Assertions d'affectation définie".

Paramètre de type générique par défaut

=

Types génériques

"Valeurs par défaut des types génériques"

Affirmation de type

as, <>

N'importe quel type

"Assertions de type", "Le type const"

Type de garde

is

Types de retour des fonctions ...

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Publisher Resources

ISBN: 9798341618688