How to fix Expected 0 arguments, but got 1 in TypeScript

// Function defined with no parameters
function greet() {
  return "Hello, World!";
}

// WRONG: Calling with an argument
greet("Bobby"); // Error TS2554: Expected 0 arguments, but got 1

// CORRECT: Call with no arguments
greet();

// BEFORE: No parameters
function greet() {
  return "Hello, World!";
}

// AFTER: Add parameter
function greet(name: string) {
  return `Hello, ${name}!`;
}

// Now this works
greet("Bobby");

function greet(name?: string) {
  return name ? `Hello, ${name}!` : "Hello, World!";
}

// Both work now
greet();        // "Hello, World!"
greet("Bobby"); // "Hello, Bobby!"

// BEFORE: Type says no arguments
type GreetFunction = () => string;

const greet: GreetFunction = () => {
  return "Hello, World!";
};

greet("Bobby"); // Error: Expected 0 arguments, but got 1

// AFTER: Update type to accept parameter
type GreetFunction = (name: string) => string;

const greet: GreetFunction = (name) => {
  return `Hello, ${name}!`;
};

greet("Bobby"); // Works!

interface Greeter {
  greet: (name: string) => string; // Updated to accept parameter
}

const myGreeter: Greeter = {
  greet: (name) => `Hello, ${name}!`,
};

function getCurrentTimestamp() {
  return Date.now();
}

// WRONG: Passing unnecessary argument
const time = getCurrentTimestamp(new Date()); // Error

// CORRECT: No arguments needed
const time = getCurrentTimestamp();

// Example with Redux Toolkit createAsyncThunk
// Old versions might have incorrect types

import { createAsyncThunk } from '@reduxjs/toolkit';

// If you see: Expected 0 arguments, but got 1
// Try updating the package:

# Update to latest version
npm update @reduxjs/toolkit
# or
npm install @reduxjs/toolkit@latest

# Also update type definitions if separate
npm update @types/your-library

// Generic function that might infer incorrectly
function identity<T>(value: T): T {
  return value;
}

// TypeScript might infer: () => void instead of (x: number) => number
const fn = identity((x: number) => x * 2);

// SOLUTION: Explicitly specify the generic type
const fn = identity<(x: number) => number>((x) => x * 2);

// Or use type assertion
const fn = identity(((x: number) => x * 2) as (x: number) => number);

import { compose } from 'redux';

// If compose has type issues, explicitly type the result
type MyComponentProps = { name: string };
const EnhancedComponent = compose<React.FC<MyComponentProps>>(
  withRouter,
  connect(mapStateToProps)
)(MyComponent);