#![feature(duration_as_u128)] use std::sync::{Arc, Mutex}; use std::thread; use std::time::{Duration, SystemTime}; use std::sync::mpsc; use std::thread::JoinHandle; fn main() { let (tx, rx) = mpsc::channel(); let now = SystemTime::now(); let handle = thread::spawn(move || { { // 定时器 let tx = tx.clone(); thread::spawn(move || {// do something thread::sleep(Duration::from_millis(500)); tx.send(Err(())).unwrap(); }); } // 干一些不为人知的事情 thread::sleep(Duration::from_millis(300)); tx.send(Ok("result")).unwrap(); }); match rx.recv().unwrap() { // 计时器 Read more

#JavaScript

January 31, 2019

前端打包常见工具

之前简单提到前端工程化的工具，Gulp 和 Webpack。这里整几个例子来详细理解一下，hexschool/gulp-demo Gulp // production || development // # gulp Read more

#Python

January 28, 2019

一个短路操作符失效的 BUG？

遇上一个百思不得其解的 BUG logger.debug("%s%s", test_case_id, test_case_info) test_case_id = test_case_id or md5(test_case_info) logger.debug("MD5: %s%s", test_case_id, md5(test_case_info)) 09:18 None {'test_cases': [{'output': '420', 'input': '5 8'}]} 09:18 MD5: None b676c8555a8384fd346b062397524020 交代背景，这是通过 exec gunicorn –workers $n –threads $n –error-logfile /log/gunicorn.log –time 600 –bind 0.0.0.0:8080 server:app flask Web 服务调用的一个方法 class Read more

#JavaScript | #CSS