Perfected-Prototypes

An extension to the Javascript Object, Array, and String prototype chain. Extending the limited functionality to what it should have been the first time around. Such as being able to search for things logically within an array, getting the first and last elements of an array. Or even being able to safely dereference an object without crashing.

Features

• Small package size (~29.1kB)
• Well tested
• Easy to install
• JSdoc documentated
• Works both in ES5 & up, and Node.JS
• Uses Object.defineProperty to avoid pollution of chain methods
• Checks to make sure there isn't overwritten methods

Installation

Using NPM:

$ npm install -s perfected-prototypes

Or Yarn:

$ yarn add perfected-prototypes

Testing

Simply run a npm install to add the testing library Then run:

$ npm run test

Usage

Simply require the module into your NodeJS project, no need to assign it to a variable or anything:

require('perfected-prototypes')

Or, if you want to use it on the front end say in a React or Angular Project:

import "perfected-prototypes"

And that's it! You're ready to go.

API

Object Methods:

Object.try()

Safely access any value on an object and have it return false upon not finding value, Example:

require('perfected-prototypes')

const foo = {
   a: {
      b: 1, 
      c: [1,2,3]
   }
}

console.log(foo.try('a.b'))
// => 1

console.log(foo.try('a.c[1]'))
// => 2

console.log(foo.try('a.b.c.d.e.f'))
// => undefined

Object.eachKeyValue()

Loop over each key and value returning undefined

const foo = { a: 1, b: 2 }

foo.eachKeyValue((key, val) => {
   console.log(key, val)
})

// => a 1
// => b 2

Object.mapOver()

Similar to forEach But this returns the objects returned at the end of the mapOver function

const foo = { a: 1, b: 2 }

console.log(foo.mapOver((key, val) => {
            key = key + '1'
            val = val * 2
            return { [key]: val }
         })
)
// => {a1: 2, b2:4}

Object.reduce()

Reduce the values witin an object to summate them

const foo = { a: 1, b: 2, c: 3, d: 4 }

console.log(foo.reduce((prev, [key, val]) => prev + val, 0))
// => 10

const foo = { a: 1, b: 2, c: 3, d: 4 }

console.log(foo.reduce((prev, [key, val]) => {prev.push(val); return prev}, []))
// => [1,2,3,4]

Object.hasData()

Test to see if there is any values within your object

const foo = {}

console.log(foo.hasData())
// => true

OR:

const foo = {a:1}

console.log(foo.hasData())
// => false

Object.mergeObjects()

Merge one or any amount of objects together, with key/value presedence dependent on order of objects passed in

const foo = {a:1}
const bar = {b:2}

console.log(foo.mergeObjects(bar))
// => {a:1, b:2}

OR:

const foo = {a:1}
const bar = {b:2}
const baz = {c:3}

console.log(foo.mergeObjects(bar,baz))
// => {a:1, b:2, c:3}

Object.deepCopy()

Deep copy the object with JSON.parse(JSON.stringify()), erasing any object references

const foo = {a:1, b:2}

const bar = foo.deepCopy()
bar.a = 2

console.log(bar)
// => {a:2,b:2}

console.log(foo)
// => {a:1, b:2}

Object.deepEqual()

Checks the equality between two objects

const obj1 = {a: 1, b:'2'}
const obj2 = {a: 1, b:'2'}

console.log(obj1.deepEqual(obj2))
// => true

Object.isObject()

Checks to see if the value passed in is an object (not arrays or functions) Also on the actual Object not on the prototype chain

const foo = {}
const bar = []
const baz = function() { return 2}

console.log(Object.isObject(foo))
// => true

console.log(Object.isObject(bar))
// => false

console.log(Object.isObject(baz))
// => false

Array Methods:

Array.first

A getter to easily get the first element of an array

const arr = [1,2,3,4,5]

console.log(arr.first)
// => 1

Array.last

A getter to easily get the last element of the array

const arr = [1,2,3,4,5]

console.log(arr.last)
// => 5

Array.access()

Access values within the array in a python like style, such that negative indexing is allowed

const arr = [1,2,3]

console.log(arr.access(-1))
// => 3

Array.remove()

Remove all instances of a value within the array and return new array

const arr = [1,2,2,3,4,5]

console.log(arr.remove(2))
// => [1,3,4,5]

Array.yank()

Returns and removes the specified values and mutates the actual array

const arr = [1,2,3,4,5]

console.log(arr.yank(2))
// => 2
console.log(arr)
// => [1,3,4,5]

console.log(arr.yank([3,4]))
// => [3,4]
console.log(arr)
// => [1,2,5]

Array.clear()

Clear the array being worked on, and return a new empty array

const arr = [1,2,3,4,5]

console.log(arr.clear())
// => []

OR:

const arr = [1,2,3,4,5]
arr.clear()

console.log(arr)
// => []

Array.unique()

Get the unique values of an array

const arr = [1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 5, 5, 5, 6]

console.log(arr.unique())
// => [1,2,3,4,5,6]

Array.uniqueBy()

Filter an array of objects to unique set of objects by some selector

const arr = [{ name: 'bob', job: 'wood' }, { name: 'bob', job: 'wood' }]

console.log(arr.uniqueBy('name'))
// => [{ name: 'bob', job: 'wood' }]

Array.isEmpty()

Checks to see if the array is empty

const arr = [1,2,3]
console.log(arr.isEmpty())
// => false

const arr  = []
console.log(arr.isEmpty())
// => true

Array.findObj()

Search for the first value that matches query in array, implemented with lodash 'find' function

Using a function:

const users = [
   { 'user': 'barney', 'age': 36, 'active': true },
   { 'user': 'fred', 'age': 40, 'active': false },
   { 'user': 'pebbles', 'age': 1, 'active': true }
];


console.log(users.findObj(o => { return o.age < 40 }))
// => { 'user': 'barney', 'age': 36, 'active': true }

Using an object:

const users = [
   { 'user': 'barney', 'age': 36, 'active': true },
   { 'user': 'fred', 'age': 40, 'active': false },
   { 'user': 'pebbles', 'age': 1, 'active': true }
];

console.log(const res = users.findObj({ 'user': 'barney', 'age': 36, 'active': true }))
// => { 'user': 'barney', 'age': 36, 'active': true }

Using array of values:

const users = [
   { 'user': 'barney', 'age': 36, 'active': true },
   { 'user': 'fred', 'age': 40, 'active': false },
   { 'user': 'pebbles', 'age': 1, 'active': true }
];

console.log(users.findObj(['active', false]))
// => { 'user': 'fred', 'age': 40, 'active': false }

Using a single level value:

const users = [
   { 'user': 'barney', 'age': 36, 'active': true },
   { 'user': 'fred', 'age': 40, 'active': false },
   { 'user': 'pebbles', 'age': 1, 'active': true }
];

console.log(users.findObj('active'))
// => { 'user': 'barney', 'age': 36, 'active': true }

Array.diff()

Find the difference between two arrays, empty if no difference

const arr1 = [1,2,3]
const arr2 = [1]

console.log(arr1.diff(arr2))
// => [2,3]

Array.shuffle()

Using the current array, shuffle the values and return new array (Doesn't mutate original).

   const arr = [1,2,3,4]
   console.log(arr.shuffle())
   // => [2,3,1,4]

Array.deepEqual()

Check the equality between two arrays returning a boolean

   const arr1 = [1,2,false, 'boo']
   const arr2 = [1,2,false, 'boo']
   
   console.log(arr1.deepEqual(arr2))
   // => true

String Methods

String.camelCase()

Turn a string into camel case: I.E - 'Brandon Dring' -> 'brandonDring'

const str =  'Brandon Dring'

console.log(str.camelCase())
// => 'brandonDring'

String.numberize()

Add appropriate commas to a whole number (No decimals)

const str = '1000000'
console.log(str.numberize())
// => '1,000,000'

String.HTMLescape()

Escape a string ready for HTML insertion: Jekyll & Hyde -> Jekyll & Hyde

   const str = 'Jekyll & Hyde'

   console.log(str.HTMLescape())
   // => 'Jekyll & Hyde'

String.startCase()

Capitalize the first letter in every word of the string (good for names)

const str = 'brandon dring'
console.log(str.startCase())
// => 'Brandon Dring'

String.contains()

Check to see if a given value is within a string

const str = 'The quick brown fox jumps over the lazy dog'

console.log(str.contains('fox'))
// => true

String.isString()

Check to see if the value is a string (On the actual String object)

const str = 'Hello world!'

console.log(String.isString(str))
// => true

Number Methods

Number.round()

Round a number to a decimal place

const num = 1.23456

console.log(num.round())

// => 1

console.log(num.round(2))
// => 1.23

Number.random()

Generate a random number between the two parameters

console.log(Number.random(0,5))
// => Between 0-5

Number.isNumber()

Check to see if the value is a number or not (On the Number object not prototype chain)

const num = 12345


console.log(Number.isNumber(num))
// => true

Contributing

Please feel free to add an issue, or create a pull request to add extra functionality to the prototype chain. However, I don't want to pollute the chain with the entire library of lodash persay, just the most useful functions.

Ackowledgements

CDK Global's annual hackathon for giving me the time to work on this.

prototypes for the general idea.

Lodash for their library to solve common issues