Regular Expressions 101

Pro

Group 1(^[^[:space:]]+[[:space:]]+[^[:space:]]+[[:space:]]+)

^start of line

Negated Character Class[^[:space:]]+

+matches at least one character outside the set below:

[:space:]a whitespace character, including a line break [ \t\r\n\v\f]

Character Class[[:space:]]+

+matches at least one character from the set below:

[:space:]a whitespace character, including a line break [ \t\r\n\v\f]

Negated Character Class[^[:space:]]+

+matches at least one character outside the set below:

[:space:]a whitespace character, including a line break [ \t\r\n\v\f]

Character Class[[:space:]]+

+matches at least one character from the set below:

[:space:]a whitespace character, including a line break [ \t\r\n\v\f]

Group 2(.)

.any character (except for line terminators)

Group 3([^[:space:]]*.*[[:space:]]+)

Negated Character Class[^[:space:]]*

*matches any number of characters outside the set below:

[:space:]a whitespace character, including a line break [ \t\r\n\v\f]

.*any character (except for line terminators), repeated any number of times

Character Class[[:space:]]+

+matches at least one character from the set below:

[:space:]a whitespace character, including a line break [ \t\r\n\v\f]

.*any character (except for line terminators), repeated any number of times

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

25 tokens

(^[^[:space:]]+[[:space:]]+[^[:space:]]+[[:space:]]+)(.)([^[:space:]]*.*[[:space:]]+).*$

New

ATOM     55  CE1 LIG X   1      -2.921   4.159 -10.046  1.00  0.00      LIGA

ATOM     55  CE1 LIG X   1      -2.921   4.159 -10.046  1.00  0.00      LIGA