Regular Expressions 101

Group 1([0-9]{4}.G[0-9]{2}(?: [0-9]{4}.G[0-9]{2})* |( )(?=Jednostki))

1st Alternative[0-9]{4}.G[0-9]{2}(?: [0-9]{4}.G[0-9]{2})*

Character Class[0-9]{4}

{4}matches exactly 4 characters from the set below:

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

.any character (except for line terminators)

Gthe literal G (71₁₀ / 107₈ / 47₁₆) (case sensitive)

Character Class[0-9]{2}

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

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

Non-Capturing Group(?: [0-9]{4}.G[0-9]{2})*

*repeats the group contents below any number of times:

the literal (32₁₀ / 40₈ / 20₁₆)

Character Class[0-9]{4}

{4}matches exactly 4 characters from the set below:

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

.any character (except for line terminators)

Gthe literal G (71₁₀ / 107₈ / 47₁₆) (case sensitive)

Character Class[0-9]{2}

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

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

the literal (32₁₀ / 40₈ / 20₁₆)

2nd Alternative( )(?=Jednostki)

Group 2( )

the literal (32₁₀ / 40₈ / 20₁₆)

Positive Lookahead(?=Jednostki)

Jednostkithe literal text Jednostki (case sensitive)

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

([0-9]{4}.G[0-9]{2}(?: [0-9]{4}.G[0-9]{2})* |( )(?=Jednostki))

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