errata-172841.ts

/////////////// 1ST CODE SAMPLE (PAGE 140) ///////////////

type Unit = 'EUR' | 'GBP' | 'JPY' | 'USD'

type Currency = {
  unit: Unit
  value: number
}

let Currency = {
  from(value: number, unit: Unit): Currency {
    return {
      unit: unit,
      value
    }
  }
}

/////////////// 2ND CODE SAMPLE (PAGE 140) ///////////////

import {Currency} from './Currency'

let amountDue: Currency = {
  unit: 'JPY',
  value: 83733.10
}
let otherAmountDue = Currency.from(330, 'EUR')