Regular Expressions 101

Non-Capturing Group(?:[^x]|\b)

1st Alternative[^x]

Negated Character Class[^x]

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

2nd Alternative\b

\ban ASCII word boundary

Group 1(x{3}|x{5})

1st Alternativex{3}

x{3}the literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive), repeated exactly 3 times

2nd Alternativex{5}

x{5}the literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive), repeated exactly 5 times

Non-Capturing Group(?:[^x]|\b)

1st Alternative[^x]

Negated Character Class[^x]

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

2nd Alternative\b

\ban ASCII word boundary

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

(?:[^x]|\b)(x{3}|x{5})(?:[^x]|\b)

New

xxxxx
xxxx xxxxx xxx
xx xxxxx xx xxx
xxxxxx
xxx