Regular Expressions 101

Pro

^start of string

Group 1(\s{1})

\s{1}any whitespace character, repeated exactly 1 time

Group 2(\s)

\sany whitespace character

Group 3(\d*)

\d*a digit, repeated any number of times

Group 4(\s)*

*repeats the group contents below any number of times:

\sany whitespace character

Group 5(.*?)

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

\na line-feed (newline) character (ASCII 10)

Group 6((\s{2})(\d)(\s*)*(.*?)\n)

Group 7(\s{2})

\s{2}any whitespace character, repeated exactly 2 times

Group 8(\d)

\da digit

Group 9(\s*)*

*repeats the group contents below any number of times:

\s*any whitespace character, repeated any number of times

Group 10(.*?)

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

\na line-feed (newline) character (ASCII 10)

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

^(\s{1})(\s)(\d*)(\s)*(.*?)\n((\s{2})(\d)(\s*)*(.*?)\n)

New

  1   MASS
  2   BLOCKCOUNT
  3   SECTOR
  4   SYSTEM

SECOND DISPLAY BLOCK REGEX COMMAND

[REPLACEFIRST]^(\s{1})(\s)(\d*)(\s)*(.*?)\n((\s{2})(\d)(\s*)*(.*?)\n)[WITH]#$3# $5
$6

Extraction

  1   MASS
  2   BLOCKCOUNT
  3   SECTOR
  4   SYSTEM

SECOND DISPLAY BLOCK REGEX COMMAND

[REPLACEFIRST]^(\s{1})(\s)(\d*)(\s)*(.*?)\n((\s{2})(\d)(\s*)*(.*?)\n)[WITH]#$3# $5
$6