@mpauze/lotide v1.0.0

Lotide

A lite clone of the Lodash library.

Purpose

BEWARE: This library was published for learning purposes. It is not intended for use in production.

This project was created and published by me as part of my learnings.

Usage

Install it:

npm install @username/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

• assertArraysEqual(actual, expected): Compares 2 arrays and provides a console output indicating deep equality. Returns undefined.
• assertEqual(actual, expected): Performs a strictly equal value evaluation and provides a console output indicating equality. Returns undefined.
• assertObjectsEqual(actual, expected): Compares 2 objects and provides a console output indicating deep equality. Returns undefined.
• countLetters(string): Returns an object mapping each letter from input string, to it's number of appearances
• countOnly(allItems, itemsToCount): Filters an array, returning an object containing the frequency of each value. Filters the output using true values in itemsToCount.
• eqArrays(actual, expected): Performs a deep equality check on input arrays. Returns true or false.
• eqObjects(actual, expected): Performs a deep equality check on input objects. Returns true or false.
• findKey(object, callback): Returns the first index on which callback(value) evaluates to true.
• findKeyByValue(object, inputValue): Returns the first index for which the object value matches the inputValue
• flatten(object, opt: output): Performs a recursive flatten on the passed in array, and returns a new array without modifying the old one
• head(array): Returns the first element of an array. Returns undefined if no elements or not an array.
• letterPositions(sentence): Returns a map of arrays containing the indexes of every occurence of a letter. Key is letter, value is array of indexes.
• map(array, callback): Returns a new array after performing callback(value) on every element.
• middle(array): Returns a new array containing the middle elements from parameter array. New array contains 2 elements if length is even, 1 element if length is odd.
• tail(array): Returns every element, except the first, in a new array.
• takeUntil(array, callback): Returns a new array, containing every element from the start of the array, until the callback(value) evaluates to true. Does not include element that caused said evaluation.
• without(arrayIn, arrayFilter): Returns a new array containing every element from arrayIn, that was not found in arrayFilter.