Standard Meta Characters
Quantifiers
Quantifiers say how many of the previous substring should match in a row. Here are a few quantifiers:
| * + ? {4,8} {5,} |
Quantifiers can only be put after atoms, assertions with width.
| "AAA000" and "BBBx" equal "[A-Z]+x?[0-9]*" |
They attach only to the previous atom, so if you want a quantifier to apply to multiple characters, you must group them together, like this:
| /(Bart){3}/ matches "BartBartBart" /Bart{3}/ matches "Barttt" |