Bash 正则表达式测试不起作用

Question

echo "Enter username"
read $WORD

if [[ "$WORD" =~ ^(Dale|Paul|Ray)$ ]]; then
    echo "$WORD is valid"
else
    echo "$WORD is invalid"
fi

Answer 1

错误出现在read命令中，请使用read WORD而不是read $WORD。

检查一下：

echo "Enter username"
read WORD

if [[ "$WORD" =~ ^(Dale|Paul|Ray)$ ]]; then
    echo "$WORD is valid"
else
    echo "$WORD is invalid"
fi