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 @alhajahmed/lotide-v2

Require it:

const _ = require('@alhajahmed/lotide-v2');

Call it:

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

Documentation

The following functions are currently implemented:

• head: returns the first element of an array.

• tail: returns a new array containing all the elements of the input array except the first one.

• middle: returns an array containing the middle element(s) of the input array.

• assertArraysEqual: checks if two arrays are equal and logs a message to the console.

• assertEqual: checks if two primitive values are equal and logs a message to the console.

• assertObjectsEqual: checks if two objects are equal and logs a message to the console.

• eqObjects: checks if two objects are equal (i.e., have the same keys and values).

• countLetters: takes a string as input and returns an object that counts the number of occurrences of each letter in the string.

• countOnly: takes an array and an object as input and returns an object that counts the number of occurrences of the keys that are true in the input object.

• eqArrays: checks if two arrays are equal (i.e., have the same elements in the same order).

• findKey: takes an object and a callback function as input and returns the first key in the object for which the callback function returns a truthy value.

• findKeyByValue: takes an object and a value as input and returns the first key in the object that has the given value.

• flatten: takes an array as input and returns a flattened version of the array (i.e., an array with no nested arrays).

• letterPositions: takes a string as input and returns an object that maps each letter to an array of its positions in the string.

• map: takes an array and a callback function as input and returns a new array containing the values returned by the callback function for each element in the input array.

• takeUntil: takes an array and a callback function as input and returns a new array containing the elements of the input array up to (but not including) the first element for which the callback function returns a truthy value.

• without: takes two arrays as input and returns a new array containing all the elements of the first array that are not present in the second array.