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Characters. * characters after deletion

\ escape characters such as: to use "\" itself, you should use "\"

\ t TAB Tab Note: both extensions and regular expressions are supported

\ r carriage return CR Note: extension is supported, regular expressions are not supported

\ nNewline character LF Note: extension is supported, but regular expressions are not supported

. Match any character

The expression to the right of ^ is matched at the beginning of the line. For example, ^ A matches lines that start with "A"

The expression to the left of $is matched at the end of the line. For example, e$ matches lines that end with "e"

| or operator that matches the string to the left and right of the expression. For example: ab | bc matches "ab" or "bc"

[] matches any single character in the list. For example, [ab] matches "a" or "b"; [0-9] matches any single number

[^] matches any single character outside the list. For example, [^ ab] matches a single character other than "a" and "b"; [^ 0-9] matches any single non-numeric character

The character to its left is matched any number of times (0 or more times). For example, be* matches "b", "be" or "bee"

The character to its left is matched at least once (1 or more times). For example, be+ matches "be" or "bee", but not "b"

? The character on its left is matched 0 or 1 times. Such as: be? Matches "b" or "be" but not "bee"

() affects the order in which expressions are matched (parentheses like C++ affect the order in which expressions are evaluated) and are used as grouping markers for expressions (tags start at 1) Note: see the example below

\ d matches a numeric character. Equivalent to: [0-9]

\ D\ d is inverted to match a non-numeric character. Equivalent to: [^ 0-9]

\ s matches any single white space character: including spaces, tabs, etc. (note: newline and newline characters are not included). Equivalent to: [\ t]

Any single character inverted by\ S\ s.

\ w matches any single character including an underscore. Equivalent to: [A-Za-z0-9]

Any single character inverted by\ W\ w. Equivalent to: [^ A-Za-z0-9 _]

Example 1

123abcfg

Abc

Abcd

To be replaced by:

123hello

Hello

Hello

Method-find string: abc.*$ replacement string: hello

Example 2

123abcfg

Abc

Abcd

To be replaced by:

123@abcfg@@abc@br/ > @ abc@

Method-find string: (abc.*) $replace string: @\ 1@

Example 3

Str [1] abc [991]

Str [2] abc [992]

Str [11] abc [993]

Str [222] abc [996]

Replace with

God [991]

God [992]

God [993]

God [996]

Method 1-- find string: str [[0-9] +] abc [([0-9] +)] replace string: god [\ 1]

Method 2-- find string: str [([0-9] +)] abc [([0-9] +)] replace string: god [\ 2]

Example 4 delete all blank lines

Step1:a. Select the regular expression b. Find string: ^ [\ t] * $replacement string: empty

Step2:a. Select extension (\ n,\ r,\ t,\ 0,\ x.) b. Find string:\ r\ n\ r\ nreplace string:\ r\ nNote: click replace multiple times until there is no replaceable string

Li Jun tel:15135361516 Qq:344728662

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