Lotide

A mini clone of the Lodash library.

Purpose

BEWARE: This library was published for learning purposes. It is not intended for use in production-grade software.

This project was created and published by me as part of my learnings at Lighthouse Labs.

Usage

Install it:

npm install @shinsensakana/lotide

Require it:

const _ = require('@shinsensakana/lotide');

Call it:

const results = _.tail([1, 2, 3]) // => [2, 3]

Documentation

The following functions are currently implemented:

• without(arr1, arr2): searches arr2 and removes them from arr1

• tail(arr): returns arr from index 1

• takeUntil(arr, callback): creates a new array from the index 0 to where the callback function is true. The callback function loops through each item in arr. You provide the callback function.

  eg. const results1 = takeUntil(arr, x => x < 0);

• map(arr, callback) : returns an array from arr with a callback function you want to run on each item of arr.

  eg. console.log(map(["dog","cat","mouse"], word => word[1])) should return "o","a","o".

• middle(arr): returns the middle element of the array. In an even numbered array it will return the two middle elements.

• letterPositions(str): creates an object with arrays for each unique letter in the string and logs their index in the string.

• head(str): creates an array with the first letter of the string.

• flatten(arr): creates a flat array from nested arr.

• findKeyByValue(value): returns the genre(key) of a TV show based on the name of the show(value)

• findKey(obj, callback) : loops through a list of hotels(object) and searchs with a callback function you provide for ratings(values) and returns the name of the hotel(key).

eg. console.log(findKey({ "Blue Hill": { stars: 1 }, "Akaleri": { stars: 3 }, "noma": { stars: 2 }, "elBulli": { stars: 5 }, "Ora": { stars: 2 }, "Akelarre": { stars: 3 } }, x => x.stars === 5) )

• eqObjects(obj): checks two objects if they are equal.

• eqArrays(arr): checks two arrays if they are equal.

• countOnly(arr1, arr2): checks two arrays and will create a new object for all names that are in both arr1 and arr2 if the name has a true value in arr2.

• countLetters(string): counts how many unique letters are in the string and how many times they repeat in an object.

• assertObjectsEqual(obj1, obj2): returns a true or false based after comparing two objects to see if they are equal.

• assertEqual(expected, result): returns a true or false if the expected or results are strictly equal

• assertArraysEqual(arr1,arr2): returns a a true or false after comparing 2 arrays to see if they are strictly equal.