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typescript "variable!: type" notation

Thoughtless Tortoise answered on May 12, 2021 Popularity 3/10 Helpfulness 1/10

answer typescript "variable!: type" notation

related typescript "variable?: type" notation

typescript "variable!: type" notation

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// Writing ! after any expression is effectively a type assertion 
// that the value isn’t null or undefined
function liveDangerously(x?: number | null) {  // No error  console.log(x!.toFixed());}Try

Popularity 3/10 Helpfulness 1/10 Language typescript

Source: www.typescriptlang.org

Tags: notation typescript

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Contributed on May 12 2021

Thoughtless Tortoise

0 Answers Avg Quality 2/10

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typescript "variable?: type" notation

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// the "last" property is optional and can be undefined
function printName(obj: { first: string; last?: string }) {  // ...}// Both OKprintName({ first: "Bob" });printName({ first: "Alice", last: "Alisson" });Try

Popularity 3/10 Helpfulness 1/10 Language typescript

Source: www.typescriptlang.org

Tags: notation typescript

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Contributed on May 12 2021

Thoughtless Tortoise

0 Answers Avg Quality 2/10

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typescript "variable!: type" notation

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