class HealthCheck.js sum / Abstraction / #of function (private)

 

class HealthCheck {

constructor(s, d, h, hr) {

this.systolic = s;

this.diastolic = d;

this.hemoglobin = h;

this.heartRate = hr;

}

#BPTest() {

console.log(`BP value is : ${this.systolic} / ${this.diastolic}`);

if (this.systolic > 160 || this.diastolic > 90)

console.log("High BP");

else if (this.systolic < 90 || this.diastolic < 60)

console.log("Low BP");

else

console.log("Normal BP");

}

Heartcheck() {

this.#BPTest(); // this is invoking the function BP test as we need the data here too

console.log((this.heartRate > 100 || this.heartRate < 80) ? "Unsafe" : "Safe");

}

SugarTest() {

this.#BPTest(); // this is invoking the function BP test as we need the data here too

console.log(this.hemoglobin > 10 ? "Sugar Patient" : "No Sugar");

}

}

let person1 = new HealthCheck(92, 55, 12, 88); // invoking the class HealthCheck for person1

instance

let person2 = new HealthCheck(164, 88, 9, 88); // invoking the class HealthCheck for person2

instance

person1.Heartcheck() // now the object or instance person1 of class HealthCheck is

// invoking the method HeartCheck(), so only the data of person1

// related to HeartCheck will get printed in the console.

//////////////////////////////////////////////////////////////////////////////////////////////

TERMINAL:

Implementation of BPTest is hidden from outside scope and the

process of hiding the implementation details from outside

environment is called "Abstraction".

The function which is having a # in front of it can be called

only within that class , it cannot be called outside the class.

And the #of function can only be declared inside a class.

I