@yuhaoyan/lotide v1.0.1

Lotide

A mini clone of the Lodash library.

Summary

This repository contains the lotide project which built a mini library for the Lighthouse Labs Web Development Bootcamp.

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 @yuhaoyan/lotide

Require it:

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

Call it:

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

Table of Contents

• assertEqual
  • compare the two values it takes in and print out a message telling us if they match or not
• head
  • returns the first item in the array
• tail
  • returns the "tail" of an array: everything except for the first item (head) of the provided array
• eqArrays
  • takes in two arrays and returns true or false, based on a perfect match
• assertArraysEqual
  • take in two arrays and console.log an appropriate message to the console
• without
  • return a subset of a given array, removing unwanted elements
• flatten
  • take in an array containing elements including nested arrays of elements, and return a "flattened" version of the array
• middle
  • take in an array and return the middle-most element(s) of the given array
• countOnly
  • be given an array and an object. It will return an object containing counts of everything that the input object listed
• countLetters
  • take in a sentence (as a string) and then return a count of each of the letters in that sentence
• letterPositions
  • return all the indices (zero-based positions) in the string where each character is found
• findKeyByValue
  • takes in an object and a value. It should scan the object and return the first key which contains the given value. If no key with that given value is found, then it should return undefined
• eqObjects
  • take in two objects and returns true or false, based on a perfect match
• assertObjectsEqual
  • take in two objects and console.log an appropriate message to the console
• map
  • take in two arguments:
    1. An array to map
    2. A callback function
  • The map function will return a new array based on the results of the callback function
• takeUntil
  • take in two parameters:
    1. The array to work with
    2. The callback (which Lodash calls "predicate")
  • The function will return a "slice of the array with elements taken from the beginning." It should keep going until the callback/predicate returns a truthy value
• findKey
  • 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