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Generates a Regular Expression that matches a range of numbers or characters. Use the generated RegExp or pattern.

Regex Range #

Generates a Regular Expression that matches a range of numbers or characters.

Features #

  • Number ranges: 1 -> 100
  • Negative to positive number ranges: -100 -> 100
  • Character ranges: A -> Z
  • Case insensitive character ranges: a -> Z

Getting Started #

dart pub add regex_range

And import the package:

import 'package:regex_range/regex_range.dart';

Usage #

To generate a regex, you may use the range function to generate both number and character ranges, depending on what's passed in. A number range is generated when passing in 2 numbers, and a character range is generated when passing in 2 strings with a length of 1.

Alternatively, you may use the numberRange and charRange functions to generate a number or character range, respectively.

Expression Pattern #

You can get the generated expression pattern by using the pattern property of the RegExp object.

final regex = range(0, 5, exact: true);

print(regex.pattern); // [0-5]

Number Range #

final regex = range(-10, 10, exact: true);
// or
final regex = numberRange(-10, 10, exact: true);

print(regex.hasMatch('-5')); // true
print(regex.hasMatch('5')); // true
print(regex.hasMatch('11')); // false

Character Range #

Case sensitivity is disabled when passing 2 characters with a different case. Case sensitivity can be set manually with the caseSensitive parameter in the charRange function.

final regex = range('b', 'Y', exact: true);
// or
final regex = charRange('B', 'Y', caseSensitive: false, exact: true);

print(regex.hasMatch('b')); // true
print(regex.hasMatch('Y')); // true
print(regex.hasMatch('Z')); // false

Generated Regex #

The expressions below are not the exact expressions generated by the package, they are the simplified equivalent.

Number Range #

Range Expression
0, 5 [0-5]
0, 10 [0-9]|10
25, 100 2[5-9]|[3-9][0-9]|100
-10, 10 -?[0-9]|-?10

Character Range #

Range Expression
A, Z [A-Z]
a, z [a-z]
a, Z [a-zA-Z]
b, Y [b-yB-Y]

Contributing #

Contributions are welcome! Please open an issue or pull request if you find a bug or have a feature request.

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Publisher

verified publisherdrafakiller.com

Generates a Regular Expression that matches a range of numbers or characters. Use the generated RegExp or pattern.

Repository (GitHub)
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License

unknown (LICENSE)

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