The code below prints only the event contents, how do I make that print WheatherData.value number? I am coming from java and I am used to do it this way.
const Event = (time, place) => { var _time = time var _place = place return { getTime() { return _time }, getPlace() { return _place }, updateTime() { _time = new Date(Date.now()) }, toString() { return 'Time: ' + _time + 'nPlace: ' + _place } } } const WeatherData = (value, time, place) => { var _event = Event(time, place) var _value = value const getValue = () => { return _value } const toString = () => { return 'nValue: ' + _value + _event.toString() } return Object.assign({ getValue, toString }, _event) } const wd = WeatherData(10.1, new Date(Date.now()), 'Chisinau, Moldova') console.log(wd.toString()) //Time: Sat Sep 18 2021 08:49:10 GMT+0200 (Central European Summer Time) //Place: Chisinau, Moldova // no value printed
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Answer
return Object.assign({ getValue, toString }, _event)
The line above causing the problem. When you assign _event
object to { getValue, toString }
object you are simply overriding toString
method of WeatherData
function. Instead, just return { getValue, toString }
from your WeatherData
function, like below;
const WeatherData = (value, time, place) => { var _event = Event(time, place); var _value = value const getValue = () => { return _value } const toString = () => { return 'nValue: ' + _value + 'n' + _event.toString() } return { getValue, toString } }