regex101: Golang Unit Test Workspace

\Astart of string

googlethe literal text google (case sensitive)

Non-Capturing Group(?:\.(?:[a-z]{1,2}|[a-z]{4,}|[^c.][a-z]{2}|[a-z][^o.][a-z]|[a-z]{2}[^m.])|\.com\.(?:[a-z]|[a-z]{3,}|[^a.][a-z]|[a-z][^u.])|(?:\.[a-z]+){3})

1st Alternative\.(?:[a-z]{1,2}|[a-z]{4,}|[^c.][a-z]{2}|[a-z][^o.][a-z]|[a-z]{2}[^m.])

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:[a-z]{1,2}|[a-z]{4,}|[^c.][a-z]{2}|[a-z][^o.][a-z]|[a-z]{2}[^m.])

1st Alternative[a-z]{1,2}

Character Class[a-z]{1,2}

{1,2}matches between 1 and 2 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

2nd Alternative[a-z]{4,}

Character Class[a-z]{4,}

{4,}matches at least 4 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

3rd Alternative[^c.][a-z]{2}

Negated Character Class[^c.]

cthe literal c (99₁₀ / 143₈ / 63₁₆) (case sensitive)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-z]{2}

{2}matches exactly 2 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

4th Alternative[a-z][^o.][a-z]

Character Class[a-z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Negated Character Class[^o.]

othe literal o (111₁₀ / 157₈ / 6F₁₆) (case sensitive)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

5th Alternative[a-z]{2}[^m.]

Character Class[a-z]{2}

{2}matches exactly 2 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Negated Character Class[^m.]

mthe literal m (109₁₀ / 155₈ / 6D₁₆) (case sensitive)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

2nd Alternative\.com\.(?:[a-z]|[a-z]{3,}|[^a.][a-z]|[a-z][^u.])

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

comthe literal text com (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:[a-z]|[a-z]{3,}|[^a.][a-z]|[a-z][^u.])

1st Alternative[a-z]

Character Class[a-z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

2nd Alternative[a-z]{3,}

Character Class[a-z]{3,}

{3,}matches at least 3 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

3rd Alternative[^a.][a-z]

Negated Character Class[^a.]

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-z]

4th Alternative[a-z][^u.]

3rd Alternative(?:\.[a-z]+){3}

Non-Capturing Group(?:\.[a-z]+)*

\zend of string

Search reference

Regular Expression

\Agoogle(?:\.(?:[a-z]{1,2}|[a-z]{4,}|[^c.][a-z]{2}|[a-z][^o.][a-z]|[a-z]{2}[^m.])|\.com\.(?:[a-z]|[a-z]{3,}|[^a.][a-z]|[a-z][^u.])|(?:\.[a-z]+){3})(?:\.[a-z]+)*\z

Regular Expressions 101

Regular Expression

Unit Tests