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BASH IFS 环境变量用法总结 | LadyRick's idea
BASH IFS 环境变量用法总结 | LadyRick's idea
之前从网上找了很多关于 IFS 的二手资料，每次用每次都得再看一遍，理解还是不够透彻。最近对照着 man bash ，终于把这个 IFS 搞清楚了。
IFS 的三种作用 IFS 其实只在 3 个地方发挥作用：
用于扩展带双引号的 "$*" 用于不带双引号的变量扩展 / 子命令扩展 / 算数扩展 用于在内建命令 read 中进行断词 可以看到，其实只有 bash 本身和 read 命
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