Selector with Multiple Input Selectors

Demonstrate how createSelector takes multiple input selectors and re-computes only when one of the inputs changes.

const { createSelector } = require('reselect');

// Input selectors
const selectNumOfApples = state => state.apples;
const selectNumOfOranges = state => state.oranges;

// A memoized selector that adds the number of apples and oranges
const selectTotalFruits = createSelector(
  [selectNumOfApples, selectNumOfOranges],
  (numApples, numOranges) => numApples + numOranges
);

// Example state
const state = { apples: 3, oranges: 5 };

// Here we use the selector
console.log(selectTotalFruits(state));  // Outputs: 8 - the function computes the total
console.log(selectTotalFruits(state));  // Outputs: 8 - the function returns the memoized result

This example defines two input selectors for the number of apples and oranges in the state. It creates a memoized selector to calculate the total fruits. On the second call with the same state, it returns the memoized result without re-computing.