some 2.2.0

Some / Maybe / Option / Result / Nullable, like Haskel Maybe, Can avoid semantic confusion caused by returning null when returning a value

2.2.0

• Support dart 3.0

2.1.0

• Add
  • isSome getter
  • isNone getter
  • map function
  • then functon
  • and function
  • flatMap function
  • andThen function
  • or function
  • orElse function
  • xor function
  • flatten function

2.0.0

Full Rewrite

1.3.0

now

• Some(1) != 1
• None() == None()

1.2.4

Fix lib/src/maybe.dart. (-0.50 points)
Analysis of lib/src/maybe.dart reported 1 hint:
line 28 col 28: Avoid types as parameter names.

Fix lib/src/none.dart. (-0.50 points)
Analysis of lib/src/none.dart reported 1 hint:
line 18 col 28: Avoid types as parameter names.

Fix lib/src/null.dart. (-0.50 points)
Analysis of lib/src/null.dart reported 1 hint:
line 12 col 44: Avoid types as parameter names.

1.2.3

Rewritten implementation

Fix bug: eq

• Some(1) != 1

now

• Some(1) == 1

Add eq test

1.2.2

remove const None
Fix bug: const None

1.2.1

Fix bug(null.dart): defaultVal and defaultValFn when Some while return None

1.2.0

Fix bug: defaultVal and defaultValFn when Some while return None

1.1.1

const None

1.1.0

Add const constructor

1.0.1

Add example

1.0.0

Create this