Introduction to pkg

The pkg library is an exceptionally powerful tool for developers, providing dozens of useful APIs to streamline various aspects of application development. This guide will introduce you to the basics of pkg and offer detailed examples of its most useful APIs. By the end, you’ll have a solid understanding of how to effectively leverage pkg in your projects.

Getting Started

To begin using pkg, you must first install it via your package manager:

npm install pkg

API Overview

API 1: createInstance

The createInstance API allows you to create a new instance of pkg with specific configurations:

  const pkg = require('pkg');
  const instance = pkg.createInstance({ configKey: 'configValue' });

API 2: fetchData

The fetchData API is used to retrieve data from a specified endpoint:

  instance.fetchData('https://example.com/api/data')
    .then(data => {
      console.log(data);
    })
    .catch(error => {
      console.error('Error fetching data:', error);
    });

API 3: computeResult

The computeResult API processes input data and returns computed results:

  const inputData = { key: 'value' };
  const result = instance.computeResult(inputData);
  console.log('Computed Result:', result);

API 4: saveToDatabase

The saveToDatabase API allows you to save data to a database:

  const data = { key: 'value' };
  instance.saveToDatabase(data)
    .then(response => {
      console.log('Data saved successfully:', response);
    })
    .catch(error => {
      console.error('Error saving data:', error);
    });

Application Example

Here is a complete example of an app that utilizes multiple pkg APIs:

  const pkg = require('pkg');
  
  const instance = pkg.createInstance({ configKey: 'configValue' });

  async function runApp() {
    try {
      const data = await instance.fetchData('https://example.com/api/data');
      const result = instance.computeResult(data);
      await instance.saveToDatabase(result);
      console.log('App ran successfully with result:', result);
    } catch (error) {
      console.error('Error running app:', error);
    }
  }

  runApp();

By following this example, you can see how multiple APIs can be combined to create a functional application that retrieves, processes, and stores data efficiently using pkg.

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