https://tonybai.com/tags/goquiz/Recent content in Goquiz on Tony BaiHugozh-cn2004-2026 Tony Bai. 版权所有.Thu, 24 Mar 2022 00:00:00 +0800https://tonybai.com/2022/03/24/the-result-of-a-len-expression-is-constant-or-variable/Thu, 24 Mar 2022 00:00:00 +0800https://tonybai.com/2022/03/24/the-result-of-a-len-expression-is-constant-or-variable/本文永久链接 – https://tonybai.com/2022/03/24/the-result-of-a-len-expression-is-constant-or-variable **len**是Go预定义标识符，同时也是Go内置的预定义函数，通过go doc工具我们能查到len函数的doc如下： ``` $go doc builtin.len package builtin // im...