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19 lines
307 B
TypeScript
19 lines
307 B
TypeScript
const assert = console.assert
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const john = {
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name: "John Smith",
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age: 27,
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}
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assert(john.name == "John Smith")
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type Person = {
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readonly name: String,
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readonly age: number,
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}
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// assert(Person['age'] == String)
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function isPerson(arg): arg is Person { return true }
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assert(isPerson(john))
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