艾丁堡

正则表达式是一个查询的字符串，它包含一般的字符和一些特殊的字符，特殊字符可以扩展查找字符串的能力，正则表达式在查找和替换字符串的作用不可忽视，它能很好提高工作效率。

EditPlus的查找，替换，文件中查找支持以下的正则表达式：

Expression Description
\t Tab character.
\n New line.
. Matches any character.
| Either expression on its left and right side matches the target string.
For example, “a|b” matches “a” and “b”.
[] Any of the enclosed characters may match the target character.
For example, “[ab]” matches “a” and “b”. “[0-9]” matches any digit.
[^] None of the enclosed characters may match the target character.
For example, “[^ab]” matches all character EXCEPT “a” and “b”.
“[^0-9]” matches any non-digit character.
* Character to the left of asterisk in the expression should match 0 or more times.
For example “be*” matches “b”, “be” and “bee”.
+ Character to the left of plus sign in the expression should match 1 or more times.
For example “be+” matches “be” and “bee” but not “b”.
? Character to the left of question mark in the expression should match 0 or 1 time.
For example “be?” matches “b” and “be” but not “bee”.
^ Expression to the right of ^ matches only when it is at the beginning of line.
For example “^A” matches an “A” that is only at the beginning of line.
$ Expression to the left of $ matches only when it is at the end of line.
For example “e$” matches an “e” that is only at the end of line.
() Affects evaluation order of expression and also used for tagged expression.
\ scape character. If you want to use character “\” itself, you should use “\\”.