Q931. 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 ...
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Q932. What should be stored in Redux vs derived with selectors?
A common mistake is storing **computed/derived values** in Redux state itself, which then has to be kept in sync manually every time the source data changes. The rule of ...
Q933. 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'...
Q934. Would you put all API data into Redux?
**No** — not by default. Server data (see [client state vs server state](#what-is-the-difference-between-client-state-and-server-state)) has different needs than plain cl...
Q935. 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...
Q936. What is the difference between BrowserRouter, HashRouter, and MemoryRouter?
All three are drop-in `` implementations from `react-router-dom` (see [What are the `` components of React Router v6?](#what-are-the-router-components-of-react-router-v6)...
Q937. 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...
Q938. What are dynamic routes and what are route parameters?
A **dynamic route** is a route path that contains a placeholder segment (a *route parameter*) instead of a fixed, hard-coded value, so a single route definition can match...
Q939. 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...
Q940. How do you navigate programmatically in React Router?
In React Router v6+, programmatic navigation (redirecting from code rather than a user clicking a link) is done with the **`useNavigate`** hook, which replaces the old `h...