day124-设计 LazyMan 类 -笔记

前言

设计 LazyMan 类,实现以下功能:

LazyMan('Tony');
// Hi I am Tony

LazyMan('Tony').sleep(10).eat('lunch');
// Hi I am Tony
// 等待了10秒...
// I am eating lunch

LazyMan('Tony').eat('lunch').sleep(10).eat('dinner');
// Hi I am Tony
// I am eating lunch
// 等待了10秒...
// I am eating diner

LazyMan('Tony').eat('lunch').eat('dinner').sleepFirst(5).sleep(10).eat('junk food');
// Hi I am Tony
// 等待了5秒...
// I am eating lunch
// I am eating dinner
// 等待了10秒...
// I am eating junk food

代码

class LazyManClass {
constructor(name) {
this.taskList = [];
this.name = name;
console.log(`Hi I am ${this.name}`);
setTimeout(() => {
this.next();
}, 0);
}
eat (name) {
var that = this;
var fn = (function (n) {
return function () {
console.log(`I am eating ${n}`)
that.next();
}
})(name);
this.taskList.push(fn);
return this;
}
sleepFirst (time) {
var that = this;
var fn = (function (t) {
return function () {
setTimeout(() => {
console.log(`等待了${t}秒...`)
that.next();
}, t * 1000);
}
})(time);
this.taskList.unshift(fn);
return this;
}
sleep (time) {
var that = this
var fn = (function (t) {
return function () {
setTimeout(() => {
console.log(`等待了${t}秒...`)
that.next();
}, t * 1000);
}
})(time);
this.taskList.push(fn);
return this;
}
next () {
var fn = this.taskList.shift();
fn && fn();
}
}
function LazyMan(name) {
return new LazyManClass(name);
}
LazyMan('Tony').eat('lunch').eat('dinner').sleepFirst(5).sleep(4).eat('junk food');
文章作者: lmislm
文章链接: http://lmislm.com/2019/05/16/2019-05-16/
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