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JavaScript

Libor Gess
Libor Gess
6,880 Points

Why the teacher started talk about ob programming?

I do not understand the code of the example. I do know how to write the arrow functions but why the teacher showing this example and talking about OB programming?

var Person = function (data) { for (var key in data) { this[key] = data[key];
} this.getKeys = () => Object.keys(this);

}

var Alena = new Person({ name: 'Alena', role: 'Teacher' });

console.log('Alena\'s Keys:', Alena.getKeys()); // 'this' refers to 'Alena'

var getKeys = Alena.getKeys;

console.log(getKeys()); // 'this' refers to the node process

I do not understand and I find this example completely confusing and irritable. Also what was the purpose of the example? Why I should still pay for this context?

1 Answer

Steven Parker
Steven Parker
229,921 Points

I think the point of the demonstration is to show how the keyword "this" has different meanings when used in different contexts. Also how conventional functions create "this" within their scope, but arrow functions do not.