tests.listindocstring

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These are useful methods that exist for both $some and $none.

• isDefined — True if not empty
• isEmpty — True if empty
• nonEmpty — True if not empty
• orElse — Evaluate and return alternate optional value if empty
• getOrElse — Evaluate and return alternate value if empty
• get — Return value, throw exception if empty
• fold — Apply function on optional value, return default if empty
• map — Apply a function on the optional value
• flatMap — Same as map but function must return an optional value
• foreach — Apply a procedure on option value
• collect — Apply partial pattern match on optional value
• filter — An optional value satisfies predicate
• filterNot — An optional value doesn't satisfy predicate
• exists — Apply predicate on optional value, or false if empty
• forall — Apply predicate on optional value, or true if empty
• contains — Checks if value equals optional value, or false if empty
• zip — Combine two optional values to make a paired optional value
• unzip — Split an optional pair to two optional values
• unzip3 — Split an optional triple to three optional values
• toList — Unary list of optional value, otherwise the empty list