Samel 
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华南农业大学 2012 前端工程师 IP属地：未知暂未填写个人简介
争取爱上刷题中：function hardMan(str) {
this.queue = []
this.name = str
this.queue.push(() => {
console.log(this.name);
this.next()
});
}
hardMan.prototype.rest = function (wait) {
const func = () => {
setTimeout(() => {
console.log(`Start learning after ${wait} seconds`)
this.next()
}, wait * 1000)
}
this.queue.push(func)
return this
}
hardMan.prototype.restFirst = function (wait) {
const func = () => {
setTimeout(() => {
console.log(`Start learning after ${wait} seconds`)
this.next()
}, wait * 1000)
}
this.queue.unshift(func)
return this
}
hardMan.prototype.learn = function (str) {
const func = () => {
console.log(`Learning ${str}`)
}
this.queue.push(func)
this.next()
}
hardMan.prototype.next = function () {
if (this.queue.length === 0) return
const func = this.queue.shift()
func()
}
const HardMan = (name)=>{
return new hardMan("jack");
}
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