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Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
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Alex A. Naanou 2017-07-03 02:34:24 +03:00
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@ -52,6 +52,9 @@ Another thing to note here is that the code above, though quite simple is
not reusable, i.e.: not reusable, i.e.:
- we can't simply use the extending method for any other parent unless we - we can't simply use the extending method for any other parent unless we
either copy/rewrite it or complicate the code. either copy/rewrite it or complicate the code.
ES5/ES6 only partially fixes this issue as `super` can only be used in
some cases (literal methods) and not others (functions and functions as
methods) which complicates things and makes them non-uniform.
- we can't use the extending method stand-alone, for example for testing - we can't use the extending method stand-alone, for example for testing
It is possible to go around these issues but not without introducing It is possible to go around these issues but not without introducing
@ -140,7 +143,6 @@ n
The only two things _inherited_ from the object defining the actions The only two things _inherited_ from the object defining the actions
via the mixin methods or `mix` function are properties and actions, via the mixin methods or `mix` function are properties and actions,
all data, including normal methods is discarded. all data, including normal methods is discarded.
_(this is not final)_
**Notes:** **Notes:**
@ -221,26 +223,27 @@ Root Action o---|---x
``` ```
- a method, created by `Action(..)`, - `Action(..)` creates a method (an _action_),
- calls all the shadowed/overloaded actions in the inheritance - an _action_ calls all the shadowed/overloaded actions in the inheritance
chain in sequence implicitly, chain in sequence implicitly,
**Notes:** **Notes:**
- there is no way to prevent an action in the chain from - there is no way to prevent an action in the chain from
running, this is by design, i.e. no way to fully shadow. running, this is by design, i.e. no way to fully shadow.
- actions that do not shadow anything are called _base_ or _root actions_. - top actions in the inheritance chain are called _base_ or _root actions_.
- returns the action set (`this`) by default (for call chaining), - an action returns the action set (`this`) by default (for call chaining),
- the base/root action can return any value. - the base/root action can return any value.
**Notes:** **Notes:**
- if undefined is returned, it will be replaced by the - if undefined is returned, it will be replaced by the
action context/action set. action context/action set.
- `false` and `null` are returned as-is.
- there is no distinction between root and other actions - there is no distinction between root and other actions
other than that root action's return values are not other than that root action's return values are not
ignored. ignored.
- can consist of two parts: the first is called before the - an action can consist of two parts: the first is called before the
shadowed action (_pre-callback_) and the second after (_post-callback_). next action in chain (_pre-callback_) and the second after (_post-callback_).
- post-callback has access to the return value and can modify it - post-callback has access to the return value and can modify it
but not replace it. but not replace it.
- can be bound to, a-la an event, calling the handlers when it is - an action can be bound to, a-la an event, calling the handlers when it is
called (_see below_), called (_see below_),
@ -263,9 +266,9 @@ action_set.on('action_name.pre', function(){
}) })
``` ```
- a function, - a handler is a function,
- can be bound to run before and/or after the action itself, - it can be bound to run before and/or after the action itself,
- is local to an action set it was bound via, - it is local to an action set it was bound via,
- when an action is triggered from an action set, all the pre - when an action is triggered from an action set, all the pre
handlers in its inheritance chain will be called before the handlers in its inheritance chain will be called before the
respective actions they are bound to and all the post handlers respective actions they are bound to and all the post handlers