dart:core
RegExp class
A regular expression pattern.
Regular expressions are Patterns, and can as such be used to match strings or parts of strings.
Dart regular expressions have the same syntax and semantics as JavaScript regular expressions. See ecma-international.org/ecma-262/9.0/#sec-regexp-regular-expression-objects for the specification of JavaScript regular expressions.
firstMatch is the main implementation method that applies a regular expression to a string and returns the first RegExpMatch. All other methods in RegExp can build on it.
Use allMatches to look for all matches of a regular expression in a string.
The following example finds all matches of a regular expression in a string.
RegExp exp = new RegExp(r"(\w+)");
String str = "Parse my string";
Iterable<RegExpMatch> matches = exp.allMatches(str);
Note the use of a raw string (a string prefixed with r) in the example above. Use a raw string to treat each character in a string as a literal character.
- Implemented types
-
Constructors
- RegExp(String source, { bool multiLine: false, bool caseSensitive: true, @Since("2.4") bool unicode: false, @Since("2.4") bool dotAll: false })
factory
- Constructs a regular expression. [...]
Properties
- isCaseSensitive → bool
read-only
- Whether this regular expression is case sensitive. [...]
- isDotAll → bool
@Since("2.4"), read-only
- Whether "." in this regular expression matches line terminators. [...]
- isMultiLine → bool
read-only
- Whether this regular expression matches multiple lines. [...]
- isUnicode → bool
@Since("2.4"), read-only
- Whether this regular expression is in Unicode mode. [...]
- pattern → String
read-only
- The source regular expression string used to create this
RegExp. - hashCode → int
read-only, inherited
- The hash code for this object. [...]
- runtimeType → Type
read-only, inherited
- A representation of the runtime type of the object.
Methods
- allMatches(String input, [ int start = 0 ]) → Iterable<RegExpMatch>
override
- Returns an iterable of the matches of the regular expression on
input. [...] - firstMatch(String input) → RegExpMatch
- Searches for the first match of the regular expression in the string
input. Returns null if there is no match. - hasMatch(String input) → bool
- Returns whether the regular expression has a match in the string
input. - stringMatch(String input) → String
- Returns the first substring match of this regular expression in
input. - matchAsPrefix(String string, [ int start = 0 ]) → Match
inherited
- Match this pattern against the start of
string. [...] - noSuchMethod(Invocation invocation) → dynamic
inherited
- Invoked when a non-existent method or property is accessed. [...]
- toString() → String
inherited
- Returns a string representation of this object.
Operators
- operator ==(dynamic other) → bool
inherited
- The equality operator. [...]
Static Methods
- escape(String text) → String
- Returns a regular expression that matches
text. [...]