Q671. What is the purpose of double tilde operator?
The double tilde operator (`~~`) in JavaScript is known as the **double bitwise NOT operator**. It is commonly used as a shorthand idiom to truncate a floating-point numb...
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Q672. What is the Redux middleware signature?
Middleware is written as **three nested (curried) functions**: ```javascript const exampleMiddleware = (store) => (next) => (action) => { // store => { getState, dispatch...
Q673. How do you convert character to ASCII code?
You can use the `String.prototype.charCodeAt()` method to convert string characters to ASCII numbers. For example, let's find ASCII code for the first letter of 'ABC' str...
Q674. What happens when you dispatch an action?
1. `store.dispatch(action)` is called with a plain action object (`{ type, payload }`). 2. The action passes through the **middleware chain** in order (e.g., logger → thu...
Q675. What is ArrayBuffer?
An ArrayBuffer object is used to represent a generic, fixed-length raw binary data buffer. You can create it as below, ```javascript let buffer = new ArrayBuffer(16); // ...
Q676. How would you structure Redux in a large application?
The recommended approach (and what Redux Toolkit is designed around) is a **"feature folder" / "ducks"** structure rather than splitting by technical type (`actions/`, `r...
Q677. What is the output of below string expression?
```javascript console.log("Welcome to JS world"[0]); ``` The output of the above expression is "W". **Explanation:** The bracket notation with specific index on a string ...
Q678. How do you handle cross-slice communication?
Since each `createSlice` only manages its own piece of state, a few patterns let one slice react to actions or data from another: 1. **`extraReducers`**: listen for anoth...
Q679. 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 ...
Q680. What are Redux serializable values?
Redux (and Redux Toolkit's default middleware) expects **state and actions to contain only plain, serializable data**: strings, numbers, booleans, `null`, plain objects, ...