Regular Expressions 101

Explanation

Pro

1st Alternative^\+?0*3*0*

^start of line

\+?optionally matches the literal + (43₁₀ / 53₈ / 2B₁₆)

0*the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated any number of times

3*the literal 3 (51₁₀ / 63₈ / 33₁₆) , repeated any number of times

0*the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated any number of times

2nd Alternative[^\s\d]

Negated Character Class[^\s\d]

\sany whitespace character

\da digit

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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25 tokens

^\+?0*3*0*|[^\s\d]

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