Comments on Impossible Siebel: ABS Framework - Prototype Library

Hi Matt, Before implementing prototypes, i recom...

2010-03-14T09:55:32.274+11:00

Hi Matt,

Before implementing prototypes, i recommend your project engage an architect that specialises in eScript to design your script library. Since the script library will be a core part of your application, it needs to be robust, improper implementation of prototypes in eScript can lead to memory leaks.

IMHO i wouldnt design a framework to meet the standards of existing code, the existing code should be re-written to utilise the framework.

While starting from scratch and understanding that...

2010-03-12T23:20:46.407+11:00

While starting from scratch and understanding that objects are different from arrays and the "correct" use of the "in" statement one thing, when trying to add these features to well established code you may find the use of "in" to iterate through arrays. Rather than rewrite all the code I'd rather avoid adding any custom methods to Array.prototype (and also Object.prototype) for this reason. I don't think I've seen any code that *has* to be in either (but am open to examples!)

Take the IsIn example mentioned: a method "inList" could be writen into String.prototype that takes an array as it's input - so to see if "Hello" is in the list "Hello", "Goodbye":

"Hello".inList(["Hello", "Goodbye"]); // true
"Hello!".inList(["Hello", "Goodbye"]); // false

Personally, I think this reads a little better than the IsIn example.

For the PS method, while interesting, again I don't see a compelling reason for it being essential to be added to the Array.prototype - I think this could just as easily be added to a Utility class in the Framework, or a Service class (to encapsulate functionality relating to Business Services) - a slightly more logical grouping than being a member of the Array class perhaps?

MattW, as Jason wrote, by using "in", yo...

2010-03-12T01:15:09.451+11:00

MattW, as Jason wrote, by using "in", you are accessing all properties of that object. You will get array's "length" property too. You must filter all non numerical indexes. Your approach is good when you know that there can be large gaps between indexes.

Hi Matt [oPS] creates an array object with oPS as...

2010-02-15T11:52:09.159+11:00

Hi Matt

[oPS] creates an array object with oPS as the first element. PSToStr returns a string representation of the PS.

The for in loop is used for object or associative array iteration. If u have a reason to use this on numerical arrays, u can filter out custom properties using the hasOwnProperty method, but this only works under the T engine.

I've been doing some of my own tinkering tryin...

2010-02-14T02:52:17.060+11:00

I've been doing some of my own tinkering trying to see if I can recreate some of the effects and benefits of the framework as I see them - I've had some success so far, as well as some head-scratching!

This line intrigues me: [oPS].PSToStr();

Ok - to me this looks like it creates an Array object, which would have the propertyset as a member. PSToStr is being invoked on the Array object - so I assume a function has been added to the Array's prototype using Array.prototype.PSToStr = function () { ... } or perhaps to the Object object's prototype. This seems to follow what you're suggesting anyway.

Am I in the right ball park?

The problem I've found with this approach (or indeed, trying to add any custom methods to either the Array or Object's prototype is that when you try to get at the Array members using "in":

var mycars = new Array(");
mycars[0] = "Saab";
mycars[1] = "Volvo";
mycars[2] = "BMW";

for (x in mycars)
{
// do something with mycars[x]
}

The method we've added using the .prototype shows up as a member also!

Any thoughts?

Hi Narayan, The ABS Framework is proprietry, it i...

2010-02-02T22:39:27.210+11:00

Hi Narayan,

The ABS Framework is proprietry, it is not shipped with any version of Siebel. You need to be on a project that has ABS to access it.

Can I know where I can access the ABS framework? I...

2010-02-02T22:16:42.165+11:00

Can I know where I can access the ABS framework? Is the prototype library included as part of Siebel 8.0 or later versions? Any help on this regard is appreciated.

Any idea how Object inheritance works in the ST en...

2009-12-03T22:16:38.516+11:00

Any idea how Object inheritance works in the ST engine?