object-extractor

Introduction

object-extractor is a JavaScript module that can be used to extract specific properties from an object. This documentation will guide you through the process of using the "extract" function effectively.

Installation

npm install object-extractor

// or

pnpm add object-extractor

Function Signature

1import extract from 'object-extractor'
2// const extract = require('object-extractor')
3
4extract({
5  extract: ['name', 'address.city'],
6  ob: obj
7});

Parameters

This module accepts a single parameter, which is an object containing the following properties:

• extract (array, required): An array that specifies the properties to extract from the object.
• ob (object, required): The object from which the properties are to be extracted.

Return Value

The function returns the extracted properties as an object.

Usage Examples

Example 1: Extracting Properties from an Object

1const obj = {
2  name: 'John',
3  age: 30,
4  address: {
5    street: '123 Main St',
6    city: 'New York',
7    country: 'USA'
8  }
9};
10
11const result = extract({
12  extract: ['name', 'address.city'],
13  ob: obj
14});
15
16console.log(result);
17// Output: { name: 'John', 'address.city': 'New York' }

In this example, the "extract" function is used to extract the properties 'name' and 'address.city' from the obj object. The resulting object contains only the extracted properties.

Example 2: Handling Invalid Parameters

1const result = extract({
2  extract: ['name', 'address.city'],
3  ob: 'invalid object'
4});
5
6console.log(result);
7// Output: 'Add a valid object'

If the "ob" parameter is not a valid object or if it is an array, the function will return the error message 'Add a valid object'.

Error Handling

The "extract" function performs basic error handling and returns appropriate error messages in the following cases:

• If the "extract" property is missing in the "params" object, the function will return the error message 'Adds an array with the properties to extract'.
• If the "ob" property is missing in the "params" object, the function will return the error message 'Add a valid object'.