LIST oF SPECIAL CHARACTERS

\      Marks the next character as special.   
^      Matches the beginning of input or line. 
$      Matches the end of input or line. 
*      Matches the preceding character zero or more times. "zo*" matches either "z" or "zoo." 
+      Matches the preceding character one or more times. "zo+" matches "zoo" but not "z."  
?      Matches the preceding character zero or one time. "a?ve?" matches the "ve" in "never."  
.      Matches any single character except a newline character.  
(pattern)  Matches pattern and remembers the match. The matched substring can be retrieved from the RegExp object's $1...$9 properties. To match parentheses characters ( ), use "\(" or "\)". 
x|y    Matches either x or y. "z|food?" matches "zoo" or "food."  
{n}    n is a nonnegative integer. Matches exactly n times. "o{2}" does not match the "o" in "Bob," but matches the first two o's in "foooood." 
{n,}  n is a nonnegative integer. Matches at least n times. "o{2,}" does not match the "o" in "Bob" and matches all the o's in "foooood." "o{1,}" is equivalent to "o+". 
{n,m}  m and n are nonnegative integers. Matches at least n and at most m times. "o{1,3}" matches the first three o's in "fooooood." 
[xyz]  A character set. Matches any one of the enclosed characters. "[abc]" matches the "a" in "plain."  
[^xyz]  A negative character set. Matches any character not enclosed. "[^abc]" matches the "p" in "plain."  
\b     Matches a word boundary, such as a space. "ea*r\b" matches the "er" in "never early."  
\B     Matches a nonword boundary. "ea*r\B" matches the "ear" in "never early."  
\d     Matches a digit character. Equivalent to [0-9].  
\D     Matches a nondigit character. Equivalent to [^0-9].  
\f     Matches a form-feed character.  
\n     Matches a linefeed character.  
\r     Matches a carriage return character.  
\s     Matches any white space including space, tab, form-feed, and so on. Equivalent to [ \f\n\r\t\v] 
\S     Matches any nonwhite space character. Equivalent to [^ \f\n\r\t\v]  
\t     Matches a tab character.  
\v     Matches a vertical tab character.  
\w     Matches any word character including underscore. Equivalent to [A-Za-z0-9_].  
\W     Matches any nonword character. Equivalent to [^A-Za-z0-9_].  
\num   Matches num, where num is a positive integer. A reference back to remembered matches. \1 matches what is stored in RegExp.$1.  
"n/    Matches n, where n is an octal, hexadecimal, or decimal escape value. Allows embedding of ASCII codes into regular expressions.  


