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 @itspladd/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

• assertArraysEqual(arr1, arr2): Logs the result of deeply comparing two arrays.
• assertEqual(a, b): Logs the result of strictly comparing two non-Object values.
• assertObjectsEqual(obj1, obj2): Logs the result of comparing two non-Array objects.
• countLetters(str): Returns an object containing each unique letter in the input string, and how many times each letter occurred.
• countOnly(arr, obj): Returns an object containing each key in the obj input that had a truthy value, and how many times that key occurred in the array.
• eqArrays(arr1, arr2): Returns true or false after deeply comparing two arrays.
• eqObjects(obj1, obj2): Returns true or false after deeply comparing two objects.
• findKey(obj, callback): Returns the first key for which the given callback function is true for that key's value.
• findKeyByValue(obj, value): Returns the first key containing the given value.
• flatten(arr): Turns an array with nested arrays into a single array containing the same values. (Only works one nested array deep.)
• head(arr): Returns the first value in an array.
• letterPositions(str): Returns an object containing an array for each unique character in the input string. The key is the character, and the array contains each index where that character was found.
• map(arr, callback): Naive clone of Array.prototype.map(). Returns an array whose elements are the results of calling the callback function on each element of the input array.
• middle(arr): Returns an array containing the middle values of an array.
• tail(arr): Returns an array containing all elements an array except for the first element.
• takeUntil(arr, callback): Returns an array containing all elements of an array until the first element for which the callback function returns true.
• without(arr1, arr2): Returns an array containing only the items from arr1 that are not found in arr2.