Bash:如何在一行中应用两个字符串操作？

Question

我想立即更改变量中文件的路径和扩展名,例如,执行以下操作

for F in $( find /foo/bar -name "*.ext" ); do 
  Ftmp=${F%.ext}
  cp $F ${Ftmp//bar/b0r}.tmp 
done

没有临时变量

可以一次应用两个字符串操作,只有bash意味着什么？

Answer 1

使用Bash 临时变量

$_    Temporary variable; initialized to pathname of script or program
      being executed. Later, stores the last argument of previous command.
      Also stores name of matching MAIL ?le during mail checks.

for F in $( find /foo/bar -name "*.ext" )
do
  : ${F%.ext}
  cp $F ${_//bar/b0r}.tmp
done