how to use the once function from the lodash library in typescript

To use the once function from the lodash library in TypeScript, you must first install the lodash library and its corresponding TypeScript definitions:

npm install lodash
npm install @types/lodash
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Then, you can import the once function from lodash, along with its proper type definitions:

index.ts
import { once } from 'lodash';

function doSomething() {
  console.log('This should only log once');
}

const runOnce = once(doSomething);
runOnce(); // logs 'This should only log once'
runOnce(); // does not log anything
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The once function wraps a function so that it can only be called once. The wrapped function is executed on the first call to the new function, and subsequent calls just return the result of the first call. This is useful for expensive operations that need to be performed only once.