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Check your knowledge: DEVELOPERS Tests
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Suppose we have the function that calculates n! (n! = n*(n-1)*…*2*1). This function is given below. Please restore the code covered up white rectangles.
Suppose we need to check the correctness of login. It should consist of 8 characters: lowercase and uppercase latin letters and digits. The login can’t start with digit. Please select all valid regular expressions.
Specifies a Square class with a side field and a method for calculating the perimeter of a square
class Square {constructor(side) {
this.side = side;
}
calculatePerimeter(){
return this.side * 4;
}
}
Based on the Square class, a Cube class is created
and the method that returns the perimeter is
overrided.Override the
calculatePerimeter() method
with extension - use parent method result for calculations.What code implements asynchronous AJAX data transfer (for example from HTML form) by defining request headers and sending data to the server.
What will be displayed at browser console?
How many array’s elements will have value 7 after running the following part of code?
What is Symbol type?
What is syntax for computed names in object property definitions?
What is keyword for access to base class constructor and methods?
What is mean by "this" keyword in javascript?