Regular Expressions 101

Pro

^start of line

Group 1([a-zA-Z]+)

Character Class[a-zA-Z]+

+matches at least one character from the set below:

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

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\s*a Unicode whitespace character, repeated any number of times

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

Group 2(.*?)

.*?any Unicode character, repeated any number of times

}the literal } (125₁₀ / 175₈ / 7D₁₆)

Positive Lookahead(?=\n[a-zA-Z]+\s*{\n|\Z)

1st Alternative\n[a-zA-Z]+\s*{\n

\na line-feed (newline) character (ASCII 10)

Character Class[a-zA-Z]+

+matches at least one character from the set below:

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

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\s*a Unicode whitespace character, repeated any number of times

{the literal { (123₁₀ / 173₈ / 7B₁₆)

\na line-feed (newline) character (ASCII 10)

2nd Alternative\Z

\Zend of string

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

s modifier: single line. Allows a dot to match line terminators

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25 tokens

^([a-zA-Z]+)\s*\{(.*?)}(?=\n[a-zA-Z]+\s*{\n|\Z)

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