Regular Expressions 101

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Regular Expression
PCRE2 (PHP >=7.3)

/
^(\d+) *?([A-Za-z]\w*)$
/
gm
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Description

A chemichal species has a species name like O2 or N3 The coefficient is how many of such molecules (the number of front) 2 O2 === 2 is the species

Submitted by anonymous - a month ago