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 @drmustafa/lotide

Require it:

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

Call it:

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

Documentation

The following functions are currently implemented:

• asserEqual(actual, expected): A function that takes an actual input and compare it to an expected output and returns.
• head(inputArr): A function that takes an argument/input (array) and outputs the 1st element of the array.
• tail(inputArr): A function that takes in an input array and returns the array except the first element without mutating the original array.
• eqArrays(arr1, arr2): A function that takes in 2 arrays and compares them to return a boolean results if they are equal/unequal.
• assertArraysEqual(actual, expected): A function that takes is 2 arrays and compare then using eqArrays function and output an assertion sentence.
• without(source, itemsToRemove): A function that takes in a source array and a itemsToRemove array and returns a new array with only those elements from source that are not present in the itemsToRemove.
• middle(inputArr): A function that takes in an array and return the middle-most element(s) of the given array.
• countOnly(allItems, itemsToCount): A function that takes an array (allItems) and an object (itemsToCount) and will return an object containing counts of everything that the input object listed.
• countLetters(inputStr): A function that takes in an array and return the middle-most element(s) of the given array.
• letterPositions(inputStr): A function that takes in a string and return all the indices (zero-based positions) in the string where each character is found as a object.
• findKeyByValue(inputObj, valueToCheck): A function that takes in an object and a value and it scans the object and return the first key which contains the given value. If no key with that given value is found, it returns undefined.
• eqObjects(object1, object2): A function that will take in two objects and returns true or false, based on a perfect match.
• assertObjectsEqual(actual, expected): A function that takes is 2 objects and compare then using eqObjects function and output an assertion sentence.
• map(array, callback): A function which takes an array and callback function to create a new array with elements decided by the callback provided.
• takeUntil(array, callback): A function that take in an array and callback will return a "slice of the array with elements taken from the beginning." It should keep going until the callback returns a truthy value.
• findKey(planetsObj, callback): A function that 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.
• flatten(nestedArr): A function that takes in an array containing elements including nested arrays of elements, and return a "flattened" version of the array.