18 lines
343 B
TypeScript
18 lines
343 B
TypeScript
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export type WithAge<TSource> = TSource & {
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age: number
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}
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export function isWithAge(obj: any): obj is WithAge<{}> {
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return typeof obj['age'] === 'number'
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}
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export function extendWithAge<
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TSource
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> (
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sourceObj: TSource,
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age: number
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): WithAge<TSource> {
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const extension = { age }
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return Object.assign({}, sourceObj, extension)
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}
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