Examples |
.*text.* |
Fully matches every line containing the text 'text' |
text |
Partially matches every line containing the text 'text' |
.*\.de$ |
Fully matches every line ending with '.de' |
.*\.de$|.*\.com$ |
Fully matches every line ending with '.de' or '.com' |
|
Character classes |
[abc] |
a, b, or c (simple class) |
[^abc] |
Any character except a, b, or c (negation) |
[a-zA-Z] |
a through z
or A through Z, inclusive (range) |
[a-d[m-p]] |
a through d,
or m through p: [a-dm-p] (union) |
[a-z&&[def]] |
d, e, or f (intersection) |
[a-z&&[^bc]] |
a through z,
except for b and c: [ad-z] (subtraction) |
[a-z&&[^m-p]] |
a through z,
and not m through p: [a-lq-z](subtraction) |
|
Predefined character classes |
. |
Any character (may or may not match line terminators) |
\d |
A digit: [0-9] |
\D |
A non-digit: [^0-9] |
\s |
A whitespace character: [ \t\n\x0B\f\r] |
\S |
A non-whitespace character: [^\s] |
\w |
A word character: [a-zA-Z_0-9] |
\W |
A non-word character: [^\w] |
|
Boundary matchers |
^ |
The beginning of a line |
$ |
The end of a line |
|
Greedy quantifiers |
X? |
X, once or not at all |
X* |
X, zero or more times |
X+ |
X, one or more times |
X{n} |
X, exactly n times |
X{n,} |
X, at least n times |
X{n,m} |
X, at least n but not more than m times |
|
Logical operators |
XY |
X followed by Y |
X|Y |
Either X or Y |