Project 1: Lotide

Lotide is a mini clone of Lodash

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 @mjthoney/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

• assertArraysEqual(array1, array2): Compares two arrays and logs assertion message to console
• assertEqual(actual, expected): Compares two values, an actual and an expected, and logs assertion message to console
• assertObjectsEqual(object1, object2): Compares two objects and logs assertion message to console
• countLetters(string): Returns a count of how many instances there are of each letter in an input string
• countOnly(itemsArray, itemsToCountObject): Returns an object containing a tally of how many instances there are of an item in an array, based on an object indicating what should be counted
• eqArrays(array1, array2): Compares two input arrays and returns a boolean value based on a perfect match
• eqObjects(object1, object2): Compares two input objects and returns a boolean value based on both objects having identical keys with identical values
• findKey(object, callback): Returns first key in an input object where the callback function returns a truthy value
• findKeyByValue(object, value): Returns first key in an input object that contains input value
• flatten(array): Returns a one dimensional array from a two dimensional array
• head(array): Returns first item of an array
• letterPositions(string): Scans input string and returns an object containing each letter and all of its indices in the string
• map(array, callback): A basic version of array.map() where the function returns a new array based on calling the given callback function on the input array
• middle(array): Returns an array containing the middle most element(s) from an input array
• tail(array): Returns a new array containing all but the first element of the input array
• takeUntil(array, callback): Returns slice of input array, stopping when the callback function returns a truthy value; the callback function has one parameter - the item in the array where the takeUntil function should stop
• without(sourceArray, itemsToRemoveArray): Removed items from an input array based on a second input array listing the items to remove