Io

Io Chain

beginner2 of 7

Learn about io chain in fp-ts io

Code Editor

02-io-chain.exercise.ts

💻
Loading editor...
Preparing Monaco Editor with TypeScript support

Test Results

Requirements

describe('IO chain', () => {
  beforeEach(() => {
    counter = 0
  })

  it('increments twice', () => {
    const result = incrementTwice()()
    expect(result).toBe(2)
  })

  it('creates message from counter', () => {
    const result = getCounterMessage()()
    expect(result).toBe('Counter: 1')
  })
})
🧪

Ready to Test?

Click "Run Tests" to see how your code performs

Pro Tips

💡 Stuck? Here's what to try:

  • • Read the comments in the code carefully
  • • Run tests frequently to get feedback
  • • Check the fp-ts documentation
  • • Use the solution if you need help

🚀 Learning Approach:

  • • Focus on understanding, not just solving
  • • Experiment with different approaches
  • • Think about real-world applications
  • • Build on previous exercises