Comments (1)
通配符及特殊符号
符号 | 意义 |
---|---|
* | 代表‘ 0 个到无穷多个’任意字符 |
? | 代表‘一定有一个’任意字符 |
[ ] | 同样代表‘一定有一个在括号内’的字元(非任意字元)。例如 [abcd] 代表‘一定有一个字符, 可能是 a, b, c, d 这四个任何一个’ |
[ - ] | 若有减号在中括号内时,代表‘在编码顺序内的所有字符’。例如 [0-9] 代表 0 到 9 之间的所有数字,因为数字的语系编码是连续的! |
[^ ] | 若中括号内的第一个字元为指数符号 (^) ,那表示‘反向选择’,例如 [^abc] 代表 一定有一个字符,只要是非 a, b, c 的其他字符就接受的意思。 |
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