Ksh命令等同于islower（）函数

Question

我想知道ksh中的任何命令是否等同于C的islower（）函数？

Answer 1

种类：您可以匹配模式[[:lower:]]

islower() {
    [[ $1 == [[:lower:]] ]]
}

char=A
islower $char && echo $char is lower case || echo not lower case

char=a
islower $char && echo $char is lower case || echo not lower case