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Example code of ustream/option

Informations about the package option

Ustream Option monad Build Status

This is a PHP interpretation of the Option type with monadic structure. We beleive that the tests document the behavior and even though the implementation is similar to php-option there are some important differences we need to highlight.

There is apply instead of map and flatMap

We found it useful, that the monadic computation may decide to return with an arbitrary type, that will be converted to an Option if necessary.

The rules for Some::apply is as follows:

Examples

Wrapping a non Option type:

No need to explicitly return with None:

There is otherwise instead of orElse with LazyOption

We use None::otherwise as the mirror of Some::apply.

Examples

Combining apply and otherwise:

Creating a chain of fallback functions:

All versions of option with dependencies

PHP Build Version
Package Version
Requires php Version >=5.3.0
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