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 yours truly as part of my learnings at Lighthouse Labs.

Usage

Install it:

npm install @cynthia-lam/lotide

Require it:

const _ = require('@cynthia-lam/lotide');

Call it:

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

Documentation

The following functions are currently implemented:

• head: returns the first item of an array
• tail: returns the last item of an array
• middle: returns the middle item of and array if its length is odd,or middle two items if length is even
• countLetters: given a string, returns an object counting how many of each letter are in the string
• countOnly: given an array of strings, allItems, and an object, itemsToCount, specifying what items to count, countOnly returns an object with key-value pairs that are the string's characters and counts of how many times the items in itemsToCount occur
• findKey: given an object and callback, returns the first key for which the callback returns a truthy value. If none, returns undefined
• findKeyByValue: takes in an object and a value, returns the first key which contains the given value. If no key, returns undefined.
• flatten: given an array containing elements including nested arrays of elements, returns a "flattened" version of the array.
• letterPositions: given a string, returns an object with key-value pairs that are the string's characters and all the indices where each character is found.
• map: performs a callback function on every element of an array
• takeUntil: given an array and a callback, returns a slice of the array stopping when the callback returns a truthy value
• without: given two arrays, source and itemsToRemove, returns a subset of source, without elements found in itemsToRemove.
• assertArraysEqual: given two arrays, logs an appropriate message to the console based on if the arrays are equal
• assertEqual: given two values, logs an appropriate message to the console based on if the values are equal
• assertObjectsEqual: given two objects, logs an appropriate message to the console based on if the arrays are equal
• eqArrays: given two arrays, returns true or false, based on a perfect match
• eqObjects: given two objects, returns true or false, based on a perfect match