| // Reflect Object - built-in object that provides methods for interceptable JavaScript operations | |
| // All methods are static | |
| // has no constructor cannot use `new` | |
| // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect | |
| const log = console.log; | |
| let alex = { | |
| name: 'Alex', | |
| id: 93, | |
| hello: function (a, b) { |
| //emitter.js | |
| const Emitter = function(){ | |
| this.events = {} | |
| } | |
| Emitter.prototype.on = function(type, callback){ | |
| this.events[type] = this.events[type] || []; | |
| this.events[type].push(callback); | |
| } |
Migrations are a way to make database changes or updates, like creating or dropping tables, as well as updating a table with new columns with constraints via generated scripts. We can build these scripts via the command line using knex command line tool.
To learn more about migrations, check out this article on the different types of database migrations!
| // inherit-compose.js | |
| // Inheritance vs Composition | |
| //INHERITANCE | |
| // Character > Human > Sam | |
| // Character > Robot > x73 | |
| // Character > Cyborg > Dolph | |
| const Character = { | |
| talk: function(...msg){ |
