Scope
| Pattern | Meaning |
|---|---|
\b |
"Word" edge (next to non "word" character) |
\bring |
Word starts with "ring", ex ringtone |
ring\b |
Word ends with "ring", ex spring |
\b9\b |
Match single digit 9, not 19, 91, 99, etc.. |
\b[a-zA-Z]{6}\b |
Match 6-letter words |
\B |
Not word edge |
\Bring\B |
Match springs and wringer |
^\d*$ |
Entire string must be digits |
^[a-zA-Z]{4,20}$ |
String must have 4-20 letters |
^[A-Z] |
String must begin with capital letter |
[\.!?"')]$ |
String must end with terminal puncutation |
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