Skip to content

Update 01_test.js #1

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Jiasm wants to merge 2 commits into
base: main
Choose a base branch
from
Open

Update 01_test.js #1

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
a21f9e1
Update 01_test.js
Jiasm Jul 8, 2021
b8849f3
Update 01_test.js
Jiasm Jul 8, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
16 changes: 8 additions & 8 deletions 04-Promise：异步并发限制器/01_test.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -11,17 +11,19 @@ class Scheduler {

add(promiseCreater) {
let _resolve;
this.queue.push(promiseCreater);
const pro = new Promise(resolve => _resolve = resolve);
this.queue.push({ p: promiseCreater, r: _resolve});

const doNext = () => {
// 队列中存在任务，并且当前正在执行的任务数量小于最大值
debugger
if (this.queue.length && this.count < this.maxCount) {
if (this.queue.length && this.queue.length < this.maxCount) {
this.count++;
this.queue.shift()().then(() => {
const task = this.queue.shift();
task.p().then(() => {
// 任务执行结束，输出结果
debugger
_resolve(123); // 存在 resolve之后没有输出的情况
task.r(123); // 存在 resolve之后没有输出的情况
debugger
this.count--;

Expand All @@ -32,9 +34,7 @@ class Scheduler {

doNext();

return new Promise((resolve) => {
_resolve = resolve;
})
return pro;
}
}

Expand All @@ -57,4 +57,4 @@ addTask(4000, '3')
debugger
addTask(4000, '4')
debugger
// 结果： 2 3 1 4
// 结果： 2 3 1 4