为什么以下bash脚本只打印输出变量？
#! /bin/bash
foo=baaz
regex='ba{2}z'
if [[ $foo =~ 'ba{2}z' ]]; then
echo "literal worked"
fi
if [[ $foo =~ $regex ]]; then
echo "variable worked"
fi
你不再需要bash正则表达式的引号：
#! /bin/bash
foo=baaz
regex='ba{2}z'
if [[ $foo =~ ba{2}z ]]; then
echo "literal worked"
fi
if [[ $foo =~ $regex ]]; then
echo "variable worked"
fi
# Should output literal worked,then variable worked
我不记得哪个版本改变了这个.