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 @kk2022/lotide

Require it:

const _ = require('@kk2022/lotide');

Call it:

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

Documentation

The following functions are currently implemented:

• assertArraysEqual(array1, array2): Asserts whether two arrays are identical
• assertEqual(actual, expected): Asserts whether two primitive values are strictly equal
• assertObjectsEqual(object1, object2): Asserts whether two objects are identical
• assertObjectsEqual(object1, object2): Asserts whether two objects are identical
• countLetters(sentence): Counts occurrences of characters in input string and returns object with character and count as key-value pairs
• countOnly(allItems, itemsToCount): Takes in an array of items and an object specifying subset of those items to be counted; outputs object with item and count as key-value pairs
• eqArrays(array1, array2): Compares two arrays and returns true if they're identical, false otherwise (accepts nested arrays)
• eqObjects(object1, object2): Compares two objects and returns true if they're identical, false otherwise (accepts nested arrays & objects)
• findKey(object, callback): Scan's input object and returns first key whose value evaluates to true when passed into the callback function; returns undefined if none found
• findKeyByValue(object, searchValue): Scan's input object and returns first key whose value matches that of the second argument; returns undefined if none found
• flatten(array): Takes in array with up to one additional layer of nested arrays and returns a non-nested (flat) array that contains all the values from the input
• head(array): Returns the first element of the input array, aka the "head" of the array
• letterPositions(sentence): Takes in a string and returns an object that contains: each character found in the input (as keys) and an array with the indices in which they were found (as values); skips white spaces
• map(array, callback): Passes each element of the input array into the callback function and returns a new array with the returned values
• middle(array): Takes in an array and returns the one or two middle elements depending on whether input has odd or even number of elements; returns empty array if input has two or less elements
• tail(array): Takes in an array and returns all but the first element, aka the "tail" of the array
• takeUntil(array): Copies each element of the input array into a new array until an element evaluates to true when passed to the callback function
• without(array): Takes in a source array and an array specifying items to be removed; returns the filtered array