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Published 7 years ago • verified publishertech42solutions.com• Latest: 6.1.0+1
outdatedDart 1 only
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An implementation of the Optional type

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Changelog #

2.0.0 #

  • Compatibility with Dart 2

1.2.3 #

  • Add an optional orElse parameter to ifPresent.

1.2.2 #

  • Optional.empty() constructor is now const.

1.2.1 #

  • Absent and Present are now subclasses of Optional. You should continue to use constructors in Optional, and not the Absent or Present ones.
  • EMPTY is now a top-level constant.

1.2.0 #

  • Operators are now overloaded, so you can add, subtract, etc., Optionals. Any operation involving an empty Optional will return an empty Optional.
  • Added examples.

1.1.0 #

  • Optional.ofNullable() and Optional.empty() constructors are now const.
  • Optional.of() constructor now throws ArgumentError when passed null, instead of NoValuePresentError.
  • NoValuePresentError now extends StateError.

1.0.0 #

  • Initial release

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An implementation of the Optional type

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