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Ajas Sharafudeen
6,726 PointsUsing "new" before Pet class while assigning all the values to a const variable.
I noticed that 'new' is used before Pet class. Is it necessary? Or can we just mention the class name and add details!
const ernie = new Pet('dog', 1, 'pug');
const vera = new Pet('dog', 8, 'border collie');
3 Answers
Emmanuel C
10,636 PointsHey Ajas,
Yes, the "new" keyword is what tells the computer to create a new object that will automatically call its constructor. I come from the backend, from the days of C++. And what the "new" keyword actually did behind the scenes, was tell the computer to set aside some memory from your computers RAM, called the Heap. That memory is then free to be used by your program to store the contents of that object. Almost all Object Oriented Programming languages have the "new" keyword. And its based on that concept.
Tim Knight
28,888 PointsHi Ajas,
Yes it's completely correct to add the new keyword before the class. You're essentially creating a new instance of that class and assigning it to the variable. Removing the new keyword would cause an error in the JavaScript file and likely stop it from processing.
Ajas Sharafudeen
6,726 PointsThank you, Tim Knight and Emmanuel C. I keep on making the mistake of not adding 'new' in the practice session. Your answers will help me remember whenever such a situation happens in the future.