Q591. What is the purpose of Error object?
The Error constructor creates an error object and the instances of error objects are thrown when runtime errors occur. The Error object can also be used as a base object ...
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Q592. What is the purpose of EvalError object?
The EvalError object indicates an error regarding the global `eval()` function. Even though this exception is not thrown by JavaScript anymore, the EvalError object remai...
Q593. What are the list of cases error thrown from non-strict mode to strict mode?
When you apply 'use strict'; syntax, some of the below cases will throw a SyntaxError before executing the script 1. When you use Octal syntax ```javascript var n = 022; ...
Q594. Do all objects have prototypes?
No. All objects have prototypes except two exceptions: * **Object.prototype** itself — This is the base object in the prototype chain, and **its prototype is** `null`. * ...
Q595. What is the difference between a parameter and an argument?
Parameter is the variable name of a function definition whereas an argument represents the value given to a function when it is invoked. Let's explain this with a simple ...
Q596. What is the purpose of some method in arrays?
The some() method is used to test whether at least one element in the array passes the test implemented by the provided function. The method returns a boolean value. Let'...
Q597. How do you combine two or more arrays?
The concat() method is used to join two or more arrays by returning a new array containing all the elements. The syntax would be as below, ```javascript array1.concat(arr...
Q598. What is the difference between Shallow and Deep copy?
There are two ways to copy an object, **Shallow Copy:** Shallow copy is a bitwise copy of an object. A new object is created that has an exact copy of the values in the o...
Q599. How do you create specific number of copies of a string?
The `repeat()` method is used to construct and return a new string which contains the specified number of copies of the string on which it was called, concatenated togeth...
Q600. How do you return all matching strings against a regular expression?
The `matchAll()` method can be used to return an iterator of all results matching a string against a regular expression. For example, the below example returns an array o...