I have been really confused when to use factories or services, this SO
question
<http://stackoverflow.com/questions/18939709/when-to-use-service-instead-of-factory>
gives
a great insight over the difference but I still don't understand over their
usage. One of the answers gives a very good conclusion of deciding what to
use when :
In conclusion,
--------------------------------------------------- | Type | Singleton|
Instantiable | Configurable|---------------------------------------------------
| Service | Yes | No | No
|--------------------------------------------------- | Factory | Yes |
Yes | No |---------------------------------------------------
| Provider| Yes | Yes | Yes |
---------------------------------------------------
1.
Use Service when you need just a simple object such as a Hash, for
example {foo;1, bar:2} It’s easy to code, but you cannot instantiate it.
2.
Use Factory when you need to instantiate an object, i.e new Customer(),
new Comment(), etc.
3.
Use Provider when you need to configure it. i.e. test url, QA url,
production url.
However what was the initial purpose of introducing services, I saw the
angular code and it seems both of them are same. In fact one is created
from another doing some debugging I found out that services are created
from factories and factories are created from providers. We just default
some values as go down the chain for instance in service you only can
create an object while in a factory you can create a hash, a value or an
object but the configuration is default and lastly in provider you can also
pass the configuration block.
Then what led to creation of services and factories when providers can do
everything and even more w.r.t. the two ?
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