为什么?当前的代码可以实现我想要的功能,但它让我感到烦恼,它是如何遵循它以及它容易出错的原因,也似乎是性能浪费,因为事情是重复的。
目标?我花在使用原型上的时间越多,我觉得代码会更简单,如果情况不是这样的话就会更加明确。
特别是如果可以重写SystemBlueprint中的this-functions而不是将实例作为参数。如果对象函数Log()和Out可能只是普通的对象?如何在SystemBuilder之外提取Log或Out?
// Local for each System object
var SystemData = {
name: '?',
id: 1,
actions: [],
destinations: []
}
// Variables shared among all Systems
const SystemShare = {
global: 1
}
// this-Functions shared among all Systems
function SystemBlueprint() {}
SystemBlueprint.prototype = {
run() {
var length = this.actions.length
for (var i = 0; i < length; i++) {
var result = this.actions[i](arguments, this)
if (result && this.destinations.length > 0) {
for (var n = 0; n < this.destinations.length; n++) {
this.destinations[n].call(null, result)
}
}
}
},
does(algorithm) {
this.actions.push(algorithm)
return this
},
random(min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
}
}
function SystemBuilder(name) {
// copy shared methods
var system = Object.create(SystemBlueprint.prototype)
Object.assign(system, JSON.parse(JSON.stringify(SystemData))) //deep copy
system.name = name
system.id = SystemShare.global++
function Log() {}
Log.prototype.local = () => console.log('fields: ' + JSON.stringify(Object.keys(system))),
system.log = new Log()
function Out(){}
Out.prototype.into = (destination) => {
system.destinations.push(destination)
return system
}
system.out = new Out()
system.trigger = {}
function OnEvent(trigger){
if(trigger === undefined) return
trigger.call(null, system.run.bind(system))
return system
}
system.trigger.on = new OnEvent()
return system
}
var system = new SystemBuilder()
system.my = 'Testing'
system.log.local()
system.does( () => 'printing output...')
system.out.into(console.log)
system.run()
答案 0 :(得分:0)
部分答案,由@Bellian的评论建议实施,有点肯定,谢谢!
哪里?内部功能SystemBuilder(...):
function Log() {}
Log.prototype.local = () => console.log('fields: ' + JSON.stringify(Object.keys(system))),
system.log = new Log()
function _local(system){
console.log('fields: ' + JSON.stringify(Object.keys(system)))
}
system.log = {local: _local.bind(this, system)}