awk - 如何非贪婪地替换一行的多个分隔字符串？

Question

我想从相应格式化的输入字符串中生成谜语。

示例输入:Foo was the +first+ to get a drink at +the bar+.
期望的输出:Foo was the _____ to get a drink at ___ ___.
使用任何标准的 shell 工具，最简单的(在眼睛上)解决方案是什么？

Answer 1

这个 awk one-liner 应该可以帮助你:

awk -F'+' -v OFS="" 'NF>2{for(i=2;i<=NF;i+=2)gsub(/\S/,"_",$i)}7'

测试

kent$  awk -F'+' -v OFS="" 'NF>2{for(i=2;i<=NF;i+=2)gsub(/\S/,"_",$i)}7' <<<"Foo was the +first+ to get a drink at +the bar+."
Foo was the _____ to get a drink at ___ ___.