Q421. What happens if you do not use rest parameter as a last argument?
The rest parameter should be the last argument, as its job is to collect all the remaining arguments into an array. For example, if you define a function like below it do...
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Q422. What are the bitwise operators available in javascript?
Below are the list of bitwise logical operators used in JavaScript 1. Bitwise AND ( & ) 2. Bitwise OR ( | ) 3. Bitwise XOR ( ^ ) 4. Bitwise NOT ( ~ ) 5. Left Shift ( > ) ...
Q423. What is a spread operator?
Spread operator allows iterables( arrays / objects / strings ) to be expanded into single arguments/elements. Let's take an example to see this behavior, ```javascript fu...
Q424. How do you determine whether object is frozen or not?
`Object.isFrozen()` method is used to determine if an object is frozen or not.An object is frozen if all of the below conditions hold true, 1. If it is not extensible. 2....
Q425. How do you determine two values same or not using object?
The `Object.is()` method determines whether two values are the same value. For example, the usage with different types of values would be, ```javascript Object.is("hello"...
Q426. What is the purpose of using object is method?
Some of the applications of Object's `is` method are follows, 1. It is used for comparison of two strings. 2. It is used for comparison of two numbers. 3. It is used for ...
Q427. How do you copy properties from one object to other?
You can use the `Object.assign()` method which is used to copy the values and properties from one or more source objects to a target object. It returns the target object ...
Q428. What are the applications of the assign method?
Below are the some of main applications of `Object.assign()` method, 1. It is used for cloning an object. 2. It is used to merge objects with the same properties.
Q429. What is a proxy object?
The Proxy object is used to define custom behavior for fundamental operations such as property lookup, assignment, enumeration, function invocation, etc. A proxy is creat...
Q430. What is the purpose of the seal method?
The `Object.seal()` method is used to seal an object, by preventing new properties from being added to it and marking all existing properties as non-configurable. But **v...