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| let numberRegexp = /^[0-9]+$/; | |
| export interface Validator<T> { | |
| isAcceptable(t: T): boolean; | |
| } | |
| export class ZipCodeValidator implements Validator<String> { | |
| isAcceptable(s: string) { | |
| return s.length === 5 && numberRegexp.test(s); | |
| } | |
| } | |
| (new ZipCodeValidator()).isAcceptable("09800"); // true |
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