wangfengflyj

需求描述 用户可以领取多张优惠券，每个优惠券附带用户身份信息，比如在某段时间内获取了某些属性课程的用户才可以使用该张优惠券。 当用户下单时，需要根据当前登录的用户身份过滤出当前商品可用的优惠券。 难点

== is often used to check if two errors equal in golang, but in some cases, errors.Is is needed for

guess what will return after executing below code, How amazing! Why? Because when compare string wit

Let's see the meaning of request_time and upstream_response_time in stress testing, request_time ups

not all panics can be recovered, such as map concurrent panic can not be recovered using defer-recov

introduce redis timeout and tcp-keepalive feature with phpredis extension to understand pconnect

php项目经常用到composer来管理依赖关系，有时候会遇到如下的错误： zzz依赖xxx，xxx依赖0.0.6版本的bbb, yyy依赖0.0.7版本的bbb，这时候会有版本冲突。zzz为根项目，

Here are some frequently used configurations. Set some action before the pod is stopped Health check

In some case when we need to process some data not all at once, this is when the pipeline pattern co