Regular Expressions 101

Group key(?<key>\w+)

\w+any word character, repeated at least once

Negative Lookahead(?!\S)

\Sany non-whitespace character

Negated Character Class[^\S\r\n]*

*matches any number of characters outside the set below:

\Sany non-whitespace character

\ra carriage return (ASCII 13)

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

Group value(?<value>(?:\S+(?:[^\S\r\n]+\S+)*)*)

Non-Capturing Group(?:\S+(?:[^\S\r\n]+\S+)*)*

*repeats the group contents below any number of times:

\S+any non-whitespace character, repeated at least once

Non-Capturing Group(?:[^\S\r\n]+\S+)*

*repeats the group contents below any number of times:

Negated Character Class[^\S\r\n]+

+matches at least one character outside the set below:

\Sany non-whitespace character

\ra carriage return (ASCII 13)

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

\S+any non-whitespace character, repeated at least once

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

Regular Expression

(?<key>\w+)(?!\S)[^\S\r\n]*(?<value>(?:\S+(?:[^\S\r\n]+\S+)*)*)

New

key
key   
   key   
key   I am a value
  key   I am a value
  key      I am a value       
    people         john jim jen josh

key
key   
   key   
key   I am a value
  key   I am a value
  key      I am a value       
    people         john jim jen josh