Regular Expressions 101

Pro

Group twas(?<twas>(?<twisting>[5])|(?<armstand>[6]))?

?repeats the group contents below at most once:

1st Alternative(?<twisting>[5])

Group twisting(?<twisting>[5])

Character Class[5]

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

2nd Alternative(?<armstand>[6])

Group armstand(?<armstand>[6])

Character Class[6]

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

Group direction(?<direction>[1-4])

Character Class[1-4]

1-4one character from 1 (49₁₀) to 4 (52₁₀)

Group flying(?<flying>(?(twas)[ ]?|[0-1]))?

?repeats the group contents below at most once:

Condition(?(twas)[ ]?|[0-1])

Uses the first branch if group twas matched

If the condition is true, match this branch:[ ]?

Character Class[ ]?

?matches at most one character from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

Otherwise, match this branch:[0-1]

Character Class[0-1]

0-1one character from 0 (48₁₀) to 1 (49₁₀)

Group summersaults(?<summersaults>[(]?(?:[1-9]|1[0-2]?)[)]?)

Character Class[(]?

?matches at most one character from the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

Non-Capturing Group(?:[1-9]|1[0-2]?)

1st Alternative[1-9]

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

2nd Alternative1[0-2]?

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-2]?

?matches at most one character from the set below:

0-2one character from 0 (48₁₀) to 2 (50₁₀)

Character Class[)]?

?matches at most one character from the set below:

)the literal ) (41₁₀ / 51₈ / 29₁₆)

Group twists(?<twists>[(]?(?:[1-9]|1[0-2]?)[)]?)?

?repeats the group contents below at most once:

Character Class[(]?

?matches at most one character from the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

Non-Capturing Group(?:[1-9]|1[0-2]?)

Character Class[)]?

Group position(?<position>[a-e])

Global pattern flags

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

A modifier: Anchored. Forces the pattern to match only at the start of the search

No unit tests · Add a test to get started

25 tokens

Regular Expression

(?<twas>(?<twisting>[5])|(?<armstand>[6]))?(?<direction>[1-4])(?<flying>(?(twas)[ ]?|[0-1]))?(?<summersaults>[(]?(?:[1-9]|1[0-2]?)[)]?)(?<twists>[(]?(?:[1-9]|1[0-2]?)[)]?)?(?<position>[a-e])

Unit Tests

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