My Lodash Recreation Project

This project aims to recreate some utility functions similar to Lodash using JavaScript. The functions are defined in the _ object within index.ts, and there are corresponding Jest tests located in __tests__/lodash.test.js.

Getting Started

Clone the repository

git clone https://github.com/elinoza/my_lodash.git cd my-lodash

Install dependencies

npm install

Run tests

npm run test

This command runs the Jest tests located in tests/lodash.test.js to ensure all functions work as expected.

Custom Lodash Functions Usage

1. Importing _ Object:

   • Import _ from index.js:

     const _ = require("../index.js");

2. Calling Functions:

   • Example:

     _.last([1, 2, 3]); // Returns 3

3. Integration Example:

   const _ = require("../index.js");
   
   const array = [1, 2, 3];
   const lastElement = _.last(array);
   console.log("Last element:", lastElement); // Output: Last element: 3
   
   

Functions Included

The functions recreated in this project include:

• last(array: any[])

  • Returns the last element of an array.

• findIndex(array: any[], predicate: Function | any)

  • Returns the index of the first element in an array that satisfies the provided testing function (predicate).

• findLastIndex(array: any[], predicate: Function | any)

  • Returns the index of the last element in an array that satisfies the provided testing function (predicate).

• drop(array: any[], n: number)

  • Creates a slice of an array with n elements dropped from the beginning.

• dropRight(array: any[], n: number)

  • Creates a slice of an array with n elements dropped from the end.

• fill(array: any[], value: any, start?: number, end?: number)

  • Fills elements of an array with a specified value from the start index to the end index.

• difference(array: any[], ...values: any[])

  • Creates an array of array values not included in the other given arrays (values) using strict equality for comparisons.

• chunk(array: any[], size: number)

  • Creates an array of elements split into groups the length of size.

Feel free to explore and expand this project with additional functions or optimizations!