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 @mithraperera/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

• head(...): takes an array and returns the first element in the array.
• tail(...): takes an array and returns the last element in the array.
• eqArrays(...): takes in 2 arrays and returns true if the arrays are equal and false otherwise.
• assertArraysEqual(...): prints an appropriate message after comparing the two arrays.
• without(...): takes in a source array and an itemsToRemove arrays and returns only the items from the source array that are not in the itemsToRemove array.
• flatten(...): takes in an array that contains elements including nested array of elements and returns a flattened version of the array.
• middle(...): takes in an array and returns middle most element of the array.
• countOnly(...): given an array and an object, it will return an object containing counts of everything that the input object listed.
• countLetters(...): the function should take in a sentence (as a string) and then return a count of each of the letters in that sentence.
• letterPositions(...): return all the indices (zero-based positions) in the string where each character is found.
• findKeyByValue(...): scan the object and return the first key which contains the given value. If no key with that given value is found, then it should return undefined
• eqObjects(...): takes in 2 objects and return true if they are equal and false otherwise.
• assertObjectsEqual(...): takes in 2 objects and returns true if they are equal and false otherwise.
• map(...): takes an array to map and a callback function as arguments and returns a new array based on the results of the callback function.
• takeUntil(...): takes an array to work with and a callback as arguments and returns a "slice of the array with elements taken from the beginning." It should keep going until the callback/predicate returns a truthy value.
• findKey(...): takes in an object and a callback. It should scan the object and return the first key for which the callback returns a truthy value. If no key is found, then it should return undefined.