Regular Expressions 101

^start of line

Non-Capturing Group(?:[a-z0-9]+)

Character Class[a-z0-9]+

+matches at least one character from the set below:

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:(?:v(?:10|\d)\.[0-9]{1,2}\.[0-9]{1,2})|week[0-9]{1,2})

1st Alternative(?:v(?:10|\d)\.[0-9]{1,2}\.[0-9]{1,2})

Non-Capturing Group(?:v(?:10|\d)\.[0-9]{1,2}\.[0-9]{1,2})

vthe literal v (118₁₀ / 166₈ / 76₁₆) (case sensitive)

Non-Capturing Group(?:10|\d)

1st Alternative10

10the literal text 10

2nd Alternative\d

\da digit

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9]{1,2}

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9]{1,2}

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

2nd Alternativeweek[0-9]{1,2}

weekthe literal text week (case sensitive)

Character Class[0-9]{1,2}

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

$end of line

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

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Search reference

Regular Expression

^(?:[a-z0-9]+)\/(?:(?:v(?:10|\d)\.[0-9]{1,2}\.[0-9]{1,2})|week[0-9]{1,2})$

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