Class Lazy<T>

Represents a lazy-evaluated value that is computed only when needed. Lazy

Example: Usage of the Lazy

// Create a Lazy instance that represents the computation of doubling a number.
const lazyDouble = Lazy.create(() => {
  console.log('Doubling...')
  return 21 * 2
})

// Evaluate the Lazy, triggering the computation.
const result1 = lazyDouble.evaluate() // Output: Doubling...
console.log(result1) // Output: 42

// Evaluate the Lazy again, but the computation is not triggered (value is cached).
const result2 = lazyDouble.evaluate()
console.log(result2) // Output: 42

// Map the Lazy to triple the value.
const lazyTriple = lazyDouble.map(value => value * 3)

// Evaluate the new Lazy, triggering the mapped computation.
const result3 = lazyTriple.evaluate() // Output: Doubling...
console.log(result3) // Output: 126

// Use async operations
const getUsers = fetch('https://jsonplaceholder.typicode.com/users')
const lazyMailList = lazyFetch(getUsers)
 .map(response => response.json())
 .map(users => users.map(user => user.email))

const result4 = await lazyMailList.evaluate()
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