let index = 0;
let stack = [];
function next() {
let fn = stack[index];
index++;
if(typeof fn === 'function'){
fn();
}
}
function fn1() {
console.log(1)
next()
}
function fn2() {
setTimeout(function() {
console.log(2)
next()
},0)
}
function fn3() {
console.log(3)
next()
}
// stack.push(fn1)
// stack.push(fn2)
// stack.push(fn3)
function Man(name) {
stack.push(function(){
console.log(name);
next();
})
}
var LazyMan = function(name) {
return new Man(name)
}
Man.prototype.sleep = function(time){
stack.push(function(){
setTimeout(function() {
console.log(time + '秒')
next()
},time *1000)
})
return this;
}
Man.prototype.eat = function(food){
stack.push(function(){
console.log('eat '+food)
next();
})
return this;
}
Man.prototype.sleepFirst = function(time){
stack.unshift(function(){
setTimeout(function() {
console.log('wake up after '+ time + '秒')
next()
},time *1000)
})
return this;
}
// LazyMan('Hank')
/* 输出:
Hi! This is Hank!
*/
// LazyMan('Hank').sleep(1).eat('dinner')
/* 输出:
Hi! This is Hank!
// 等待10秒..
Wake up after 10
Eat dinner~
*/
// LazyMan('Hank').eat('dinner').eat('“supper”')
/* 输出:
Hi This is Hank!
Eat dinner~
Eat supper~
*/
LazyMan('“Hank”').sleepFirst(2).eat('“supper”')
/* 等待5秒，输出
Wake up after 5
Hi This is Hank!
Eat supper
*/
// console.log(stack[0]())
next()