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 @jackson.stark/lotide

Require it:

const _ = require('@jackson.stark/lotide');

Call it:

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

Documentation

The following functions are currently implemented:

• assertArraysEqual(...): asserts that two arrays are equal, returns true (pass) or false (fail).
• assertEqual(...): asserts that two primitive-data-type inputs are equal, returns true (pass) or false (fail).
• assertObjectsEqual(...): asserts that two objects are equal, returns true (pass) or false (fail).
• countLetters(...): counts the number of letters within an string.
• countOnly(...): counts the number of occurences of an item within an array.
• eqArrays(...): checks if two arrays are equal, returns true or false.
• eqObjects(...): checks if two objects are equal, returns true or false.
• findKey(...): takes in an object and a callback, scans the object and returns the first key for which the callback returns a truthy value. If no key is found, then it should return undefined.
• findKeyByValue(...): takes in an object and a value, scans the object and returns the first key which contains the given value. If no key with that given value is found, then it should return undefined.
• flatten(...): takes in an array of arrays and returns a "flattened" version of the array.
• head(...): returns the first item in the array.
• letterPositions(...): returns an object of all the indices (zero-based positions) in the input string where each character is found.
• map(...): returns a new array with the results of calling a provided function on every element in the calling array.
• middle(...): Excludes first and last elements and returns an array with only the middle elemen(s) of the provided array.
• tail(...): returns the "tail" of an array: everything except for the first item (head) of the provided array.
• takeUntil(...): return a "slice of the array with elements taken from the beginning." It should keep going until the callback/predicate returns a truthy value.
• without(...): return a subset of a given array, removing unwanted elements.