I found the following way of calling prototype methods in javascript :
this.abc(x,y,z).cnt;
What will this statement call, the arguments and what will be the return values. I saw this kind of usage in my application that Im currently working on.
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2 Answers
this.abc(x,y,z).cnt means
.abcis a method of your current object (or whateverthisis defined to be).abcacceptsx,y,zand returns an object- The returned object has a property called
cnt this.abc(x,y,z).cntbasically gets the value of that property
If you are familiar with languages like Python, it is equivalent to
self.abc(x, y, z)["cnt"]
1 Comment
Shyam R
ya fine thanks. As I have not used that pattern, I got confused whether will there any arg manipulation while passing values to the prototype method
That this call method abc with parameter x,y,z and then take cnt property.
Look at this example, and focus to variable data in abc method.
// init a class
function Obj(){}
// add method abc
Obj.prototype.abc = function(x, y, z) {
var cnt = x + y + z;
var data = {cnt: cnt};
// return object with cnt property
return data;
}
const obj = new Obj();
const x = 1, y = 2, z = 3;
// cnt = 6
var cnt = obj.abc(x,y,z).cnt;
// equal with this
var data = obj.abc(x, y, z);
console.log(data.cnt)
