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 @dexyod/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

• map(array, callback): The map function will return a new array based on the results of the callback function.
• takeUntil(array, callback): The function will return a slice of the array with elements taken from the beginning. It should keep going until the callback/predicate returns a truthy value.
• findKey(object, callback): It should scan the object and return the first key for which the callback returns a truthy value.
• middle(array): The middle function should return an array with only the middle element(s) of the provided array.
• countOnly(array, object): countOnly will be given an array and an object. It will return an object containing counts of everything that the input object listed.
• countLetters(string): The function should take in a sentence (as a string) and then return a count of each of the letters in that sentence.
• letterPositions(string): The letterPositions function will return all the indices (zero-based positions) in the string where each character is found.
• findKeyByValue(object, value): The findKeyByValue function should scan the object and return the first key which contains the given value.
• eqObjects(obj1, obj2): The function eqObjects which will take in two objects and returns true or false, based on a perfect match.
• assertObjectsEqual(actual, expected): The assertObjectsEqual will take in two objects and console.log an appropriate message to the console if they are equal or not.
• eqArrays(array1, array2): The eqArrays function takes in two arrays and returns true or false, based on a perfect match.
• assertArraysEqual(actual, expected): The assertArraysEqual will take in two arrays and console.log an appropriate message to the console if they are equal or not.
• without(array1, array2): The without function will return a subset of a given array, removing unwanted elements.
• flatten(array1): The function flatten will take in an array containing elements including nested arrays of elements, and return a "flattened" version of the array.
• assertEqual(actual, expected): The assertEqual function will take in two arguments and console.log an appropriate message to the console if they are equal or not.
• head(array): The head function takes in an array and retrieves the first element from the array. This is often referred to as the "head" of the array.
• tail(array): The tail function returns the "tail" of an array: everything except for the first item (head) of the provided array.