Maia313/design-patterns

https://github.com/fbeline/design-patterns-JS/tree/master/src

Creational pattern:

Constructor:

creates objects through functions

the new keyword:

• Creates a brand new object
• Links to an object prototype
• Binds this to the new object scope. Implicitly returns this

Module pattern:

object literal

• simple way to encapsulate methods
• creates a toolbox of functions to use

Factory pattern:

simplifies object creation

• Simplifies object creation
• Creating different objects based on need
• Repository Creation

Singleton

Used to restrict an object to one instance of that object across the application.

• Remembers the last time you used it
• Hands the same instance back
• Node.js uses CommonJS

Table of Contents

• 💪🏻 Motivation
• ✍🏻 Notation
• 👀 Examples
  • [] is equal ![]
  • true is not equal ![], but not equal [] too
  • true is false
  • baNaNa
  • NaN is not a NaN
  • Object.is() and === weird cases
  • It's a fail
  • [] is truthy, but not true
  • null is falsy, but not false
  • document.all is an object, but it is undefined
  • Minimal value is greater than zero
  • function is not a function
  • Adding arrays
  • Trailing commas in array
  • Array equality is a monster
  • undefined and Number
  • parseInt is a bad guy
  • Math with true and false
  • HTML comments are valid in JavaScript
  • NaN is not a number
  • [] and null are objects
  • Magically increasing numbers
  • Precision of 0.1 + 0.2
  • Patching numbers
  • Comparison of three numbers
  • Funny math
  • Addition of RegExps
  • Strings aren't instances of String
  • Calling functions with backticks
  • Call call call
    • A constructor property
  • Object as a key of object's property
  • Accessing prototypes with __proto__
  • `${{Object}}`
  • Destructuring with default values
  • Dots and spreading
  • Labels
  • Nested labels
  • Insidious try..catch
  • Is this multiple inheritance?
  • A generator which yields itself
  • A class of class
  • Non-coercible objects
  • Tricky arrow functions
  • Arrow functions can not be a constructor
  • arguments and arrow functions
  • Tricky return
  • Chaining assignments on object
  • Accessing object properties with arrays
  • Number.toFixed() display different numbers
  • Math.max() less than Math.min()
  • Comparing null to 0
  • Same variable redeclaration
  • Default behavior Array.prototype.sort()
  • resolve() won't return Promise instance
  • {}{} is undefined
  • arguments binding
  • An alert from hell
  • An infinite timeout
  • A setTimeout object
  • Double dot
  • Extra Newness
  • Why you should use semicolons
    • Split a string by a space
  • A stringified string
  • Non-strict comparison of a number to true
• 📚 Other resources