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 @pwsjas/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

• assertArraysEqual(arr1, arr2): takes two arrays, uses eqArrays() to determine whether two arrays are equal, console.logs the result
• assertEqual(actual, expected): takes two values (not an object or array), and console.logs whether they are equal or not
• assertObjectsEqual(actual, expected): takes two objects, uses eqObjects() to determine whether two objects are equal, console.logs the result
• countLetters(letters): takes a string, and count the number of each letter within the string, displaying the result as an object of letters (a: 2, b: 7, etc)
• countOnly(allItems, itemsToCount): takes an array and object, returns an object containing the amount of each value in the array, that was listed in the input object
• eqArrays(arr1, arr2): takes two arrays, compares them for equivalence, returns true or false
• eqObjects(obj1, obj2): takes two objects, compares them for equivalence, returns true or false (only to a depth of 1 nested object)
• findKey(obj, callback): takes an object and a callback function, returns the first key for which the callback returns a truthy value, otherwise returns undefined
• findKeyByValue(objToSearch, value): takes an object and a value, returns the first key which contains that value, otherwise returns undefined
• flatten(arr): takes an array containing nested arrays, and returns a "flat" version, one single depth array of values (only to a depth of 1 nested array)
• head(arr): takes an array, returns the first value in the array (array[0]);
• letterPositions(sentence): takes a string, returns an object containing the index of each letter (a: 0, b: [4, 7], etc)
• map(array, callback): takes an array and a callback function, returns an array modified by the callback function
• middle(arr): takes an array, returns an array contianing the middle value (2 values in the case of an even length array)
• tail(array): takes an array, returns an array containing everything but the first element(head) of the array
• takeUntil(array, callback): takes an array and a callback function, iterates through the array, copying every value until the callback function returns true, returns the copied array
• without(...): takes two arrays, one "source" array, and one array containing values to remove from the source array, returns a copy of the "source" array, without the values of the second array