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<pre class="prettyprint lang-js"><span id='RegExp'>/**
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</span> * @class RegExp
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*
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* Creates a regular expression object for matching text according to a pattern.
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*
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* When using the constructor function, the normal string escape rules (preceding
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* special characters with \ when included in a string) are necessary. For
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* example, the following are equivalent:
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*
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* var re = new RegExp("\\w+");
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* var re = /\w+/;
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*
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* Notice that the parameters to the literal format do not use quotation marks to
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* indicate strings, while the parameters to the constructor function do use
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* quotation marks. So the following expressions create the same regular
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* expression:
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*
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* /ab+c/i;
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* new RegExp("ab+c", "i");
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*
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* # Special characters in regular expressions
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*
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* | Character | Meaning
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* |:-----------------|:--------------------------------------------------------------------------------------
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* | `\` | For characters that are usually treated literally, indicates that the next character
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* | | is special and not to be interpreted literally.
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* | | For example, `/b/` matches the character 'b'. By placing a backslash in front of b, that
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* | | is by using `/\b/`, the character becomes special to mean match a word boundary.
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* | |
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* | | _or_
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* | |
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* | | For characters that are usually treated specially, indicates that the next character is
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* | | not special and should be interpreted literally.
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* | |
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* | | For example, `*` is a special character that means 0 or more occurrences of the preceding
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* | | character should be matched; for example, `/a*\/` means match 0 or more "a"s. To match *
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* | | literally, precede it with a backslash; for example, `/a\*\/` matches 'a*'.
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* | |
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* | `^` | Matches beginning of input. If the multiline flag is set to true, also matches
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* | | immediately after a line break character.
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* | |
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* | | For example, `/^A/` does not match the 'A' in "an A", but does match the first 'A' in
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* | | "An A".
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* | |
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* | `$` | Matches end of input. If the multiline flag is set to true, also matches immediately
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* | | before a line break character.
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* | |
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* | | For example, `/t$/` does not match the 't' in "eater", but does match it in "eat".
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* | |
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* | `*` | Matches the preceding item 0 or more times.
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* | |
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* | | For example, `/bo*\/` matches 'boooo' in "A ghost booooed" and 'b' in "A bird warbled",
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* | | but nothing in "A goat grunted".
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* | |
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* | `+` | Matches the preceding item 1 or more times. Equivalent to `{1,}`.
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* | |
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* | | For example, `/a+/` matches the 'a' in "candy" and all the a's in "caaaaaaandy".
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* | |
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* | `?` | Matches the preceding item 0 or 1 time.
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* | |
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* | | For example, `/e?le?/` matches the 'el' in "angel" and the 'le' in "angle."
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* | |
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* | | If used immediately after any of the quantifiers `*`, `+`, `?`, or `{}`, makes the quantifier
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* | | non-greedy (matching the minimum number of times), as opposed to the default, which is
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* | | greedy (matching the maximum number of times).
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* | |
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* | | Also used in lookahead assertions, described under `(?=)`, `(?!)`, and `(?:)` in this table.
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* | |
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* | `.` | (The decimal point) matches any single character except the newline characters: \n \r
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* | | \u2028 or \u2029. (`[\s\S]` can be used to match any character including new lines.)
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* | |
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* | | For example, `/.n/` matches 'an' and 'on' in "nay, an apple is on the tree", but not 'nay'.
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* | |
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* | `(x)` | Matches `x` and remembers the match. These are called capturing parentheses.
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* | |
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* | | For example, `/(foo)/` matches and remembers 'foo' in "foo bar." The matched substring can
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* | | be recalled from the resulting array's elements `[1], ..., [n]` or from the predefined RegExp
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* | | object's properties `$1, ..., $9`.
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* | |
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* | `(?:x)` | Matches `x` but does not remember the match. These are called non-capturing parentheses.
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* | | The matched substring can not be recalled from the resulting array's elements `[1], ..., [n]`
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* | | or from the predefined RegExp object's properties `$1, ..., $9`.
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* | |
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* | `x(?=y)` | Matches `x` only if `x` is followed by `y`. For example, `/Jack(?=Sprat)/` matches 'Jack' only if
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* | | it is followed by 'Sprat'. `/Jack(?=Sprat|Frost)/` matches 'Jack' only if it is followed by
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* | | 'Sprat' or 'Frost'. However, neither 'Sprat' nor 'Frost' is part of the match results.
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* | |
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* | `x(?!y)` | Matches `x` only if `x` is not followed by `y`. For example, `/\d+(?!\.)/` matches a number only
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* | | if it is not followed by a decimal point.
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* | |
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* | | `/\d+(?!\.)/.exec("3.141")` matches 141 but not 3.141.
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* | |
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* |<code>x&#124;y</code>| Matches either `x` or `y`.
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* | |
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* | | For example, `/green|red/` matches 'green' in "green apple" and 'red' in "red apple."
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* | |
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* | `{n}` | Where `n` is a positive integer. Matches exactly n occurrences of the preceding item.
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* | |
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* | | For example, `/a{2}/` doesn't match the 'a' in "candy," but it matches all of the a's
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* | | in "caandy," and the first two a's in "caaandy."
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* | |
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* | `{n,}` | Where `n` is a positive integer. Matches at least n occurrences of the preceding item.
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* | |
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* | | For example, `/a{2,}/` doesn't match the 'a' in "candy", but matches all of the a's in
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* | | "caandy" and in "caaaaaaandy."
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* | |
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* | `{n,m}` | Where `n` and `m` are positive integers. Matches at least `n` and at most `m` occurrences of the
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* | | preceding item.
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* | |
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* | | For example, `/a{1,3}/` matches nothing in "cndy", the 'a' in "candy," the first two a's
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* | | in "caandy," and the first three a's in "caaaaaaandy". Notice that when matching
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* | | "caaaaaaandy", the match is "aaa", even though the original string had more a's in it.
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* | |
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* | `[xyz]` | A character set. Matches any one of the enclosed characters. You can specify a range of
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* | | characters by using a hyphen.
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* | |
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* | | For example, `[abcd]` is the same as `[a-d]`. They match the 'b' in "brisket" and the 'c'
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* | | in "chop".
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* | |
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* | `[^xyz]` | A negated or complemented character set. That is, it matches anything that is not
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* | | enclosed in the brackets. You can specify a range of characters by using a hyphen.
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* | |
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* | | For example, `[^abc]` is the same as `[^a-c]`. They initially match 'r' in "brisket" and
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* | | 'h' in "chop."
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* | |
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* | `[\b]` | Matches a backspace. (Not to be confused with `\b`.)
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* | |
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* | `\b` | Matches a word boundary, such as a space. (Not to be confused with `[\b]`.)
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* | |
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* | | For example, `/\bn\w/` matches the 'no' in "noonday"; `/\wy\b/` matches the 'ly' in
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* | | "possibly yesterday."
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* | |
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* | `\B` | Matches a non-word boundary.
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* | |
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* | | For example, `/\w\Bn/` matches 'on' in "noonday", and `/y\B\w/` matches 'ye' in "possibly
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* | | yesterday."
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* | |
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* | `\cX` | Where X is a letter from A - Z. Matches a control character in a string.
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* | |
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* | | For example, `/\cM/` matches control-M in a string.
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* | |
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* | `\d` | Matches a digit character in the basic Latin alphabet. Equivalent to `[0-9]`.
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* | |
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* | | For example, `/\d/` or `/[0-9]/` matches '2' in "B2 is the suite number."
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* | |
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* | `\D` | Matches any non-digit character in the basic Latin alphabet. Equivalent to `[^0-9]`.
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* | |
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* | | For example, `/\D/` or `/[^0-9]/` matches 'B' in "B2 is the suite number.
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* | |
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* | `\f` | Matches a form-feed.
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* | |
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* | `\n` | Matches a linefeed.
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* | |
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* | `\r` | Matches a carriage return.
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* | |
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* | `\s` | Matches a single white space character, including space, tab, form feed, line feed and
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* | | other unicode spaces. Equivalent to:
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* | |
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* | | `[\t\n\v\f\r \u00a0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000]`
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* | |
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* | | For example, `/\s\w*\/` matches ' bar' in "foo bar."
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* | |
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* | `\S` | Matches a single character other than white space. Equivalent to:
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* | |
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* | | `[^\t\n\v\f\r \u00a0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000]`
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* | |
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* | | For example, `/\S\w*\/` matches 'foo' in "foo bar."
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* | |
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* | `\t` | Matches a tab.
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* | |
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* | `\v` | Matches a vertical tab.
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* | |
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* | `\w` | Matches any alphanumeric character from the basic Latin alphabet, including the
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* | | underscore. Equivalent to `[A-Za-z0-9_]`.
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* | |
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* | | For example, `/\w/` matches 'a' in "apple," '5' in "$5.28," and '3' in "3D."
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* | |
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* | `\W` | Matches any character that is not a word character from the basic Latin alphabet. Equivalent
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* | | to `[^A-Za-z0-9_]`.
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* | |
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* | | For example, `/\W/` or `/[^A-Za-z0-9_]/` matches '%' in "50%."
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* | |
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* | `\n` | Where `n` is a positive integer. A back reference to the last substring matching the n
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* | | parenthetical in the regular expression (counting left parentheses).
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* | |
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* | | For example, `/apple(,)\sorange\1/` matches 'apple, orange,' in "apple, orange, cherry,
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* | | peach." A more complete example follows this table.
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* | |
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* | `\0` | Matches a NULL character. Do not follow this with another digit.
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* | |
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* | `\xhh` | Matches the character with the code `hh` (two hexadecimal digits)
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* | |
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* | `\uhhhh` | Matches the character with the Unicode value `hhhh` (four hexadecimal digits)
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*
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* The literal notation provides compilation of the regular expression when the expression is evaluated. Use
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* literal notation when the regular expression will remain constant. For example, if you use literal notation
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* to construct a regular expression used in a loop, the regular expression won't be recompiled on each iteration.
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*
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* The constructor of the regular expression object, for example, new RegExp("ab+c"), provides runtime
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* compilation of the regular expression. Use the constructor function when you know the regular expression
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* pattern will be changing, or you don't know the pattern and are getting it from another source, such as user input.
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*
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* <div class="notice">
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* Documentation for this class comes from <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/RegExp">MDN</a>
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* and is available under <a href="http://creativecommons.org/licenses/by-sa/2.0/">Creative Commons: Attribution-Sharealike license</a>.
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* </div>
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*/
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<span id='RegExp-method-constructor'>/**
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</span> * @method constructor
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* Creates new regular expression object.
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*
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* @param {String} pattern
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* The text of the regular expression.
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* @param {String} flags
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* If specified, flags can have any combination of the following values:
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*
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* - "g" - global match
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* - "i" - ignore case
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* - "m" - Treat beginning and end characters (^ and $) as working over multiple lines
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* (i.e., match the beginning or end of _each_ line (delimited by \n or \r), not
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* only the very beginning or end of the whole input string)
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*/
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//Methods
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<span id='RegExp-method-exec'>/**
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</span> * @method exec
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* Executes a search for a match in its string parameter.
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*
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* If the match succeeds, the `exec` method returns an array and updates properties of the regular
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* expression object. The returned array has the matched text as the first item, and then one item for
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* each capturing parenthesis that matched containing the text that was captured. If the match fails,
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* the `exec` method returns `null`.
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*
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* If you are executing a match simply to find true or false, use the `test` method or the `String
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* search` method.
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*
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* Consider the following example:
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*
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* // Match one d followed by one or more b's followed by one d
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* // Remember matched b's and the following d
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* // Ignore case
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* var re = /d(b+)(d)/ig;
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* var result = re.exec("cdbBdbsbz");
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*
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* The following table shows the results for this script:
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*
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* | Object | Property/Index | Description | Example
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* |:-----------------|:---------------|:---------------------------------------------------------------------|:---------------------
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* | `result` | | The content of myArray. | `["dbBd", "bB", "d"]`
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* | | `index` | The 0-based index of the match in the string | `1`
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* | | `input` | The original string. | `cdbDdbsbz`
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* | | `[0]` | The last matched characters. | `dbBd`
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* | | `[1], ...[n]` | The parenthesized substring matches, if any. The number of possible | `[1] = bB`
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* | | | parenthesized substrings is unlimited. | `[2] = d`
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* | `re` | `lastIndex` | The index at which to start the next match. | `5`
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* | | `ignoreCase` | Indicates the "`i`" flag was used to ignore case. | `true`
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* | | `global` | Indicates the "`g`" flag was used for a global match. | `true`
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* | | `multiline` | Indicates the "`m`" flag was used to search in strings across | `false`
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* | | | multiple lines. |
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* | | `source` | The text of the pattern. | d(b+)(d)
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*
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* If your regular expression uses the "`g`" flag, you can use the `exec` method multiple times to find
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* successive matches in the same string. When you do so, the search starts at the substring of `str`
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* specified by the regular expression's `lastIndex` property (`test` will also advance the `lastIndex`
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* property). For example, assume you have this script:
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*
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* var myRe = /ab*\/g;
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* var str = "abbcdefabh";
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* var myArray;
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* while ((myArray = myRe.exec(str)) != null)
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* {
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* var msg = "Found " + myArray[0] + ". ";
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* msg += "Next match starts at " + myRe.lastIndex;
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* print(msg);
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* }
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*
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* This script displays the following text:
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*
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* Found abb. Next match starts at 3
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* Found ab. Next match starts at 9
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*
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* You can also use `exec()` without creating a RegExp object:
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*
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* var matches = /(hello \S+)/.exec('This is a hello world!');
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* alert(matches[1]);
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*
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* This will display an alert containing 'hello world!';
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*
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* @param {String} str The string against which to match the regular expression.
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* @return {Array} Array of results or `NULL`.
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*/
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<span id='RegExp-method-test'>/**
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</span> * @method test
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* Tests for a match in its string parameter.
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*
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* When you want to know whether a pattern is found in a string use the test method (similar to the
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* `String.search` method); for more information (but slower execution) use the exec method (similar to
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* the `String.match` method). As with exec (or in combination with it), test called multiple times on
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* the same global regular expression instance will advance past the previous match.
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*
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* The following example prints a message which depends on the success of the test:
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*
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* function testinput(re, str){
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* if (re.test(str))
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* midstring = " contains ";
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* else
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* midstring = " does not contain ";
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* document.write (str + midstring + re.source);
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* }
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*
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* @param {String} str The string against which to match the regular expression.
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* @return {Boolean} true if string contains any matches, otherwise returns false.
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*/
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<span id='RegExp-method-toString'>/**
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</span> * @method toString
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* Returns a string representing the specified object. Overrides the `Object.prototype.toString`
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* method.
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*
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* The RegExp object overrides the `toString` method of the `Object` object; it does not inherit
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* `Object.toString`. For RegExp objects, the `toString` method returns a string representation of the
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* regular expression.
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*
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* The following example displays the string value of a RegExp object:
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*
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* myExp = new RegExp("a+b+c");
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* alert(myExp.toString()); // displays "/a+b+c/"
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*
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* @return {String} Regular expression as a string.
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*/
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//Properties
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// Note that several of the RegExp properties have both long and short (Perl-like) names.
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// Both names always refer to the same value. Perl is the programming language from which
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// JavaScript modeled its regular expressions.
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<span id='RegExp-property-global'>/**
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</span> * @property {Boolean} global
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* Whether to test the regular expression against all possible matches in a
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* string, or only against the first.
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*
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* `global` is a property of an individual regular expression object.
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*
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* The value of `global` is true if the "`g`" flag was used; otherwise, `false`. The "`g`" flag
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* indicates that the regular expression should be tested against all possible matches in a string.
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*
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* You cannot change this property directly.
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*/
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<span id='RegExp-property-ignoreCase'>/**
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</span> * @property {Boolean} ignoreCase
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* Whether to ignore case while attempting a match in a string.
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*
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* `ignoreCase` is a property of an individual regular expression object.
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*
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* The value of `ignoreCase` is true if the "`i`" flag was used; otherwise, false. The "`i`" flag indicates
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* that case should be ignored while attempting a match in a string.
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*
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* You cannot change this property directly.
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*/
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|
<span id='RegExp-property-lastIndex'>/**
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</span> * @property {Number} lastIndex
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* The index at which to start the next match. A read/write integer property that specifies the index
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* at which to start the next match.
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*
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* `lastIndex` is a property of an individual regular expression object.
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*
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* This property is set only if the regular expression used the "`g`" flag to indicate a global search.
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* The following rules apply:
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*
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* - If `lastIndex` is greater than the length of the string, `regexp.test` and `regexp.exec` fail,
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* and `lastIndex` is set to 0.
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* - If `lastIndex` is equal to the length of the string and if the regular expression matches the
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* empty string, then the regular expression matches input starting at `lastIndex`.
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* - If `lastIndex` is equal to the length of the string and if the regular expression does not match
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* the empty string, then the regular expression mismatches input, and `lastIndex` is reset to 0.
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* - Otherwise, `lastIndex` is set to the next position following the most recent match.
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*
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* For example, consider the following sequence of statements:
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*
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* - `re = /(hi)?/g` Matches the empty string.
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* - `re("hi")` Returns `["hi", "hi"]` with `lastIndex` equal to 2.
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* - `re("hi")` Returns `[""]`, an empty array whose zeroth element is the match string. In this
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* case, the empty string because `lastIndex` was 2 (and still is 2) and "`hi`" has length 2.
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*/
|
|
<span id='RegExp-property-multiline'>/**
|
</span> * @property {Boolean} multiline
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* Whether or not to search in strings across multiple lines.
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*
|
* `multiline` is a property of an individual regular expression object..
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*
|
* The value of `multiline` is true if the "`m`" flag was used; otherwise, `false`. The "`m`" flag
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* indicates that a multiline input string should be treated as multiple lines. For example, if "`m`"
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* is used, "`^`" and "`$`" change from matching at only the start or end of the entire string to the
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* start or end of any line within the string.
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*
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* You cannot change this property directly.
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*/
|
|
<span id='RegExp-property-source'>/**
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</span> * @property {String} source
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* The text of the pattern.
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*
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* A read-only property that contains the text of the pattern, excluding the forward slashes.
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*
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* `source` is a property of an individual regular expression object.
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*
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* You cannot change this property directly.
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*/</pre>
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