Version
Anchors | |
---|---|
^ |
Start of string, or start of line in multi-line pattern |
$ |
End of string, or end of line in multi-line pattern |
\b |
Word boundary |
\B |
Not word boundary |
Character Classes | |
---|---|
\s |
White space |
\S |
Not white space |
\d |
Digit |
\D |
Not digit |
\w |
Word |
\W |
Not Word |
\x |
Hexadecimal digit Used for matching hex code characters, such as:
|
Quantifiers | |
---|---|
* |
White space |
+ |
Not white space |
? |
Digit |
{3} |
Exactly 3 |
{3,} |
3 or more |
{3,5} |
3, 4, or 5 |
Escape Sequences | |
---|---|
\ |
Escape following character ^ [ . $ { * ( \ + ) | ? < > |
Special Characters | |
---|---|
\n |
New line |
\r |
Carriage return |
\t |
Tab |
Groups and Ranges | |
---|---|
. |
Any character except new line (\n) |
\r |
Carriage return |
(a|b) |
a or b |
(...) |
Group |
(?:...) |
Passive (non-capturing) group |
[abc] |
Range (a or b or c) |
[^abc] |
Not (a or b or c) |
[a-q] |
Lower case letter from a to q |
[A-Q] |
Upper case letter from A to Q |
[0-7] |
Digit from 0 to 7 |
String Replacement | |
---|---|
$n |
nth non-passive group |
$2 |
"xyz" in /^(abc(xyz))$/ |
$1 |
"xyz" in /^(?:abc)(xyz)$/ |
$` |
Before matched string |
$' |
After matched string |
$+ |
Last matched string |
$& |
Entire matched string |
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