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 @stefantalbot/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

• countLetters(string): Counts the number of times each character appears in the given string. Returns an object.

• countOnly(array, filterObject): Counts the number of times each value appears in the array but only if the filterObject has a matching key set to true. Returns an object.

• eqArrays(arrayA, arrayB): Compares arrayA to arrayB. Works with nested arrays. Returns a boolean.

• eqObjects(objectA, objectB): Compares objectA to objectB. Works with deep objects. Returns a boolean.

• findKey(object, callback): Returns a string of the key if the callback returns true. The current key is passed as an argument to the call back function.

• findKeyByValue(object, value): Searches an object for the first key to match the given value. Returns the key as a string.

• flatten(array): Takes an array with nested arrays, and extracts the values to be within the same array. Returns an array.

• head(array): Extracts the value from index 0 of the given array. Returns typeof value.

• letterPositions(string): Calculates the index positions for each character of the given string. Returns an object containing the characters as keys and their index positions as values.

• map(array, callback): Modifies each value of the array using the given call back. The value is passed as an argument to the callback. Returns a new array with the modified values.

• middle(array): Finds the middle value of the given array. If the array has an even length, it will return 2 values. If the array has 2 or less values it will return an empty array. Returns an array with the middle index/indicies.

• tail(array): Returns a new array containing every value of the given array except for the value at index 0.

• takeUntil(array, callback): Stores the values from the given array starting at value 0, stopping when the callback returns true. Returns the new array.

• without(array, ): Modifies each value of the array using the given call back. The value is passed as an argument to the callback. Returns a new array with the modified values.

• assertEqual(valueA, valueB): NOTE: Replaced by mocha and chai. Logs a colorful assertion based on the outcome of comparing valueA to valueB.

• assertArraysEqual(arrayA, arrayB): NOTE: Replaced by mocha and chai. Logs a colorful assertion based on the outcome of comparing arrayA to arrayB.

• assertObjectsEqual(objectA, objectB): NOTE: Replaced by mocha and chai. Logs a colorful assertion based on the outcome of comparing objectA to objectB.