Number

The number method is used to validate a number.

You can also use the class AcanthisNumber to create a number schema.

Example

import 'package:acanthis/acanthis.dart';

void main() {
  final age = number().positive();

  final result = age.tryParse(24);

  if (result.success) {
	print('The schema is valid!');
  } else {
	print('The schema is invalid!');
  }
}

TIP

The AcanthisParseResult object, that is returned by the parse and tryParse method is described here.

Methods

positive

The positive method is used to validate a positive number.

import 'package:acanthis/acanthis.dart';

void main() {
  final age = number().positive();

  final result = age.tryParse(24);

  if (result.success) {
	print('The schema is valid!');
  } else {
	print('The schema is invalid!');
  }
}

negative

The negative method is used to validate a negative number.

import 'package:acanthis/acanthis.dart';

void main() {
  final age = number().negative();

  final result = age.tryParse(-24);

  if (result.success) {
	print('The schema is valid!');
  } else {
	print('The schema is invalid!');
  }
}

integer

The integer method is used to validate an integer.

import 'package:acanthis/acanthis.dart';

void main() {
  final age = number().integer();

  final result = age.tryParse(24);

  if (result.success) {
	print('The schema is valid!');
  } else {
	print('The schema is invalid!');
  }
}

gte

The gte method is used to validate that a number is greater than or equal to a value.

import 'package:acanthis/acanthis.dart';

void main() {
  final age = number().gte(18);

  final result = age.tryParse(24);

  if (result.success) {
	print('The schema is valid!');
  } else {
	print('The schema is invalid!');
  }
}

gt

The gt method is used to validate that a number is greater than a value.

import 'package:acanthis/acanthis.dart';

void main() {
  final age = number().gt(18);

  final result = age.tryParse(24);

  if (result.success) {
	print('The schema is valid!');
  } else {
	print('The schema is invalid!');
  }
}

lte

The lte method is used to validate that a number is less than or equal to a value.

import 'package:acanthis/acanthis.dart';

void main() {
  final age = number().lte(18);

  final result = age.tryParse(24);

  if (result.success) {
	print('The schema is valid!');
  } else {
	print('The schema is invalid!');
  }
}

lt

The lt method is used to validate that a number is less than a value.

import 'package:acanthis/acanthis.dart';

void main() {
  final age = number().lt(18);

  final result = age.tryParse(24);

  if (result.success) {
	print('The schema is valid!');
  } else {
	print('The schema is invalid!');
  }
}

multipleOf

The multipleOf method is used to validate that a number is a multiple of a value.

import 'package:acanthis/acanthis.dart';

void main() {
  final age = number().multipleOf(2);

  final result = age.tryParse(24);

  if (result.success) {
	print('The schema is valid!');
  } else {
	print('The schema is invalid!');
  }
}

finite

The finite method is used to validate that a number is finite.

import 'package:acanthis/acanthis.dart';

void main() {
  final age = number().finite();

  final result = age.tryParse(24);

  if (result.success) {
	print('The schema is valid!');
  } else {
	print('The schema is invalid!');
  }
}

infinite

The infinite method is used to validate that a number is infinite.

import 'package:acanthis/acanthis.dart';

void main() {
  final age = number().infinite();

  final result = age.tryParse(double.infinity);

  if (result.success) {
	print('The schema is valid!');
  } else {
	print('The schema is invalid!');
  }
}

nan

The nan method is used to validate that a number is NaN.

import 'package:acanthis/acanthis.dart';

void main() {
  final age = number().nan();

  final result = age.tryParse(double.nan);

  if (result.success) {
	print('The schema is valid!');
  } else {
	print('The schema is invalid!');
  }
}

notNaN

The notNaN method is used to validate that a number is not NaN.

import 'package:acanthis/acanthis.dart';

void main() {
  final age = number().notNaN();

  final result = age.tryParse(24);

  if (result.success) {
	print('The schema is valid!');
  } else {
	print('The schema is invalid!');
  }
}

list

The list method is used to validate a list of num objects.

For the list validations methods, you check the List page.

import 'package:acanthis/acanthis.dart';

void main() {
  final numbers = number().list();

  final result = numbers.tryParse([24, 255]);

  if (result.success) {
	print('The schema is valid!');
  } else {
	print('The schema is invalid!');
  }
}