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

To use the isBuffer function from the Lodash library in TypeScript, you need to first install the Lodash library and its corresponding TypeScript definition:

npm install --save lodash @types/lodash
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Then, you can import and use the isBuffer function in your TypeScript file:

index.ts
import * as _ from 'lodash';

function processBuffer(buffer: Buffer | ArrayBuffer): void {
  if (_.isBuffer(buffer)) {
    // The `buffer` parameter is a `Buffer`.
    console.log(`Processing buffer with length ${buffer.length}`);
  } else {
    // The `buffer` parameter is an `ArrayBuffer`.
    console.warn('Unsupported buffer format');
  }
}
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In this example, the processBuffer function accepts a parameter that can be either a Buffer or an ArrayBuffer. The isBuffer function from Lodash is used as a type guard to determine if the parameter is a Buffer or not. If it is, the function can safely operate on the Buffer object.

Note that TypeScript includes a Buffer type definition for Node.js environments by default, so you don't need to install any additional type definitions for it. However, if you're working with browser environments, you may need to install a separate Buffer type definition.