how to use the memoize function from lodash in javascript

To use the memoize function from lodash in JavaScript, start by installing the lodash package using npm:

index.tsx
npm install --save lodash
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After installing the package, import the memoize function into your JavaScript code and pass a function that you wish to memoize as an argument to memoize. The memoize function caches the result of the function call based on the arguments passed to it, and returns the cached result if the function is called again with the same arguments.

Here's an example:

index.tsx
const _ = require('lodash');

function expensiveFunction(arg1, arg2) {
  console.log('expensiveFunction called with', arg1, arg2);
  // Some expensive computation
  return arg1 + arg2;
}

const memoizedFn = _.memoize(expensiveFunction);

console.log(memoizedFn(1, 2)); // Output: expensiveFunction called with 1 2, 3
console.log(memoizedFn(1, 2)); // Output: 3 (value returned from cache)
console.log(memoizedFn(3, 4)); // Output: expensiveFunction called with 3 4, 7
console.log(memoizedFn(3, 4)); // Output: 7 (value returned from cache)
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In the above example, the expensiveFunction is being called twice with the same arguments (1 and 2). The first time, the function is called and the result is returned (i.e., expensiveFunction called with 1 2, 3). The second time, the result is returned from the cache (i.e., 3). Similarly, for the second set of arguments (3 and 4), the function is called once and the result is returned. The second time, the result is returned from the cache. This helps optimize the performance of the code, since the expensive computation is done only once for each set of arguments.