The issue arises in the initial code snippet provided below, specifically when dealing with the object book. Initially, the value of book.year is set to 2013. Even after updating the value by setting book.year = 2015, retrieving the value using book.year still returns 2013 instead of 2015. The question remains - where am I making a mistake?
Below is the code snippet in question:
var book = {};
Object.defineProperties(book, {
_yearOrigin: {
value: 2013
},
edition: {
value: "1st"
},
year: {
get: function(){return this._yearOrigin},
set: function(newValue){
//assigning this._yearOrigin
this._yearOrigin = newValue;
//operations for evaluating the 'subscript' to add in this.edition
var diff = String(newValue - 2013);
var diffLast2ndChar = diff.charAt(diff.length - 2);
var diffLastChar = diff.charAt(diff.length - 1);
var subscript = "";
if (diff.length > 1 && diffLast2ndChar == "1") {
subscript = "th";
} else {
subscript = diffLastChar == "1"
? "st"
: diffLastChar == "2"
? "nd"
: diffLastChar == "3"
? "rd"
: "th" ;
}
//assignment operation for this.edition
var rawEdition = Number(this.edition.charAt(0)) + Number(diff);
this.edition = String(rawEdition) + subscript;
}
}
});
>>> book.year = 2015
>>>book.year //the output comes as 2013, but it should be 2015
In contrast, another similar code excerpt presented below showcases an expected behavior. When attempting to retrieve the value of book2.year, and subsequently setting it as 2013, the output correctly reflects 2013.
var book2 = {
_year: 2004,
edition: 1
};
Object.defineProperty(book2, "year", {
get: function(){
return this._year;
},
set: function(newValue){
if (newValue > 2004) {
this._year = newValue;
this.edition += newValue - 2004;
}
}
});
book2.year = 2005;
console.log(book2.year); //2005 (In this instance, the output is as expected)