A, reference
Introduction to regular expressions
Second, the basic
2.1 Quantifier metacharacters
| expression | instructions | The sample |
|---|---|---|
* |
> = 0 |
|
+ |
> 1 |
|
? |
< = 1 |
|
{m} |
=m |
|
{m,} |
>=m |
|
{m,n} |
>=m <=n |
Introduction to regular expressions
| expression | instructions | The sample |
|---|---|---|
* |
> = 0 |
|
+ |
> 1 |
|
? |
< = 1 |
|
{m} |
=m |
|
{m,} |
>=m |
|
{m,n} |
>=m <=n |