Dart RegExp pattern
Syntax & Examples

RegExp.pattern property

The `pattern` property in Dart's `RegExp` class retrieves the source regular expression string used to create the `RegExp` object.

Syntax of RegExp.pattern

The syntax of RegExp.pattern property is:

 String pattern

This pattern property of RegExp the source regular expression string used to create this RegExp.

Return Type

RegExp.pattern returns value of type String.


✐ Examples

1 Pattern Retrieval

In this example,

  1. We create a regular expression `regex` with a specific pattern.
  2. We retrieve and print the `pattern` property of the regex.

Dart Program

void main() {
  RegExp regex = RegExp('^hello');
  print('regex.pattern: ${regex.pattern}');
}

Output

regex.pattern: ^hello

2 Pattern Retrieval

In this example,

  1. We create a regular expression `regex` with a specific pattern.
  2. We retrieve and print the `pattern` property of the regex.

Dart Program

void main() {
  RegExp regex = RegExp('Hello');
  print('regex.pattern: ${regex.pattern}');
}

Output

regex.pattern: Hello

3 Pattern Retrieval

In this example,

  1. We create a regular expression `regex` with a specific pattern.
  2. We retrieve and print the `pattern` property of the regex.

Dart Program

void main() {
  RegExp regex = RegExp('World');
  print('regex.pattern: ${regex.pattern}');
}

Output

regex.pattern: World

Summary

In this Dart tutorial, we learned about pattern property of RegExp: the syntax and few working examples with output and detailed explanation for each example.