union_types.ts

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초급10

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고급10

utility_types.ts

api_service.ts

type_guard.ts

generic_constraint.ts

union_types.ts

mapped_type.ts

decorator.ts

template_literal.ts

conditional_type.ts

assertion.ts

전문가5

마스터5

union_types.ts

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type Result<T> = { ok: true; data: T } | { ok: false; error: string };↵

const parse = (r: Result<User>): User | null =>↵

r.ok ? r.data : null;

0WPM•0%•0:00•0/143(0%)|Ln 1, Col 1

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관련 연습 문제

utility_types.ts api_service.ts type_guard.ts generic_constraint.ts mapped_type.ts decorator.ts