Regular Expressions 101

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/
\D
/
gm
\D matches any character that's not a digit (equivalent to [^0-9])
Global pattern flags
g modifier: global. All matches (don't return after first match)
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
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Regular Expression
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/
/
gm

Test String

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