Regular Expressions 101

Explanation

Pro

Group 1(\b(?:\S+\s+){0,5}?)

\ban ASCII word boundary

Non-Capturing Group(?:\S+\s+){0,5}?

{0,5}?repeats the group contents below between 0 and 5 times:

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

\s+any whitespace character, repeated at least once

Group 2(\brahuls?[^\s\w]*(?=\s|$))

\ban ASCII word boundary

rahulthe literal text rahul (case insensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case insensitive)

Negated Character Class[^\s\w]*

*matches any number of characters outside the set below:

\sany whitespace character

\wany word character

Positive Lookahead(?=\s|$)

1st Alternative\s

\sany whitespace character

2nd Alternative$

$end of string, or before its final line terminator

Positive Lookahead(?=((?:\s+\S+){0,5}))

Group 3((?:\s+\S+){0,5})

Non-Capturing Group(?:\s+\S+){0,5}

{0,5}repeats the group contents below between 0 and 5 times:

\s+any whitespace character, repeated at least once

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

Global pattern flags

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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Detailed match information will be displayed here automatically.

25 tokens

(\b(?:\S+\s+){0,5}?)(\brahuls?[^\s\w]*(?=\s|$))(?=((?:\s+\S+){0,5}))

New

rahul hello rahul! vyas and rahul? and rahul. and rahul: and rahul and rahul( and rahul) and rahul{ rahul.shiv rahuls vyas rips rahul!!