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nil

Posted by 夏泽民 May 16, 2020

You need to loop over each of the elements in the slice and test. Equality for slices is not defined. However, there is a bytes.Equal function if you are comparing values of type []byte.

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lock chan

Posted by 夏泽民 May 16, 2020

chan用于high-level （高端的编程，比如说，两个程序（运行在同一台电脑，或者不同电脑上），或者两个线程（thread）之间的sync）, 而锁用于low-level（低端编程，单个变量的sync). 如果把线程安全定义为允许多个goroutine同时去读写，那么golang 的channel 是线程安全的。不需要在并发读写同一个channe时加锁。 channel用于goroutine之间的通信

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apcu

Posted by 夏泽民 May 16, 2020

APCu 是老牌 PHP 字节码和对象缓存 缓存器 APC 的分支，具体由来还得讲个故事。

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timer

Posted by 夏泽民 May 15, 2020

https://segmentfault.com/a/1190000022646776 Go语言的标准库里提供两种类型的计时器Timer和Ticker。Timer经过指定的duration时间后被触发，往自己的时间channel发送当前时间，此后Timer不再计时。Ticker则是每隔duration时间都会把当前时间点发送给自己的时间channel，利用计时器的时间channel可以实现很多与计时相关的功能。

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semgrep

Posted by 夏泽民 May 15, 2020

https://mp.weixin.qq.com/s/tJm0d1ZW3_9PViK3S8xgrw https://github.com/returntocorp/semgrep

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