英文:
C-Shell regex compare a variable with two strings
问题
这返回1：
if ( "$TERM" =~ "xterm*" ) echo 1
但这些返回空值：
if ( "$TERM" =~ "(xterm*|rxvt*)" ) echo 1
if ( "$TERM" =~ "(xterm|rxvt)*" ) echo 1
我应该如何在csh中执行OR正则比较？提前感谢。
英文:
This returns 1:
if ( "$TERM" =~ "xterm*" ) echo 1
but these return nothing:
if ( "$TERM" =~ "(xterm*|rxvt*)" ) echo 1
if ( "$TERM" =~ "(xterm|rxvt)*" ) echo 1
How am I supposed to do OR regex comparisons in csh? Thanks in advance.
答案1
得分: 2
C-Shell 中 =~ 运算符的右操作数不是正则表达式模式，而是通配符模式。
从此文档中找到：
">=~ 和 !~ 运算符类似于 != 和 ==，不同之处在于右侧是一个通配符模式（参见文件名替代），与左侧操作数进行匹配。"
英文:
The right-hand operand in C-Shell's =~ operator is not a RegEx pattern but a glob pattern.
From this documentation I found:
>The operators '=~' and '!~' are like '!=' and '==' except that the right hand side is a glob-pattern (see Filename substitution) against which the left hand operand is matched.
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