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[Acceleo] select over a Set(String) object [message #904500]

Tue, 28 August 2012 10:42

Eclipse User

How may I execute a select over an set of String?
I mean setOfString->select(='test') is wrong, also setOfString->select(self='test')
what is the right syntax?

Re: [Acceleo] select over a Set(String) object [message #904507 is a reply to message #904500]

Tue, 28 August 2012 10:54

Eclipse User

Hi

Have you tried defining an iterator variable and using it?

Regards

Ed Willink

On 28/08/2012 15:42, Andrea Sindico wrote:
> How may I execute a select over an set of String?
> I mean setOfString->select(='test') is wrong, also
> setOfString->select(self='test')
> what is the right syntax?

Re: [Acceleo] select over a Set(String) object [message #904517 is a reply to message #904500]

Tue, 28 August 2012 11:25

Eclipse User

My aim is not to iterate over the set. I need to do something only if a string (say 'test') is contained in the set. If the set does not contain that string I need to do something else.
i.e.

[if setOfString->select(??='test')->notEmpty()]
generate something
[else]
generate something else
[/if]

How would you do that by means of an iterator?

Re: [Acceleo] select over a Set(String) object [message #904545 is a reply to message #904517]

Tue, 28 August 2012 12:46

Eclipse User

setOfString->exists(s : String | s = 'test')
setOfString->includes('test')

Regards

Ed Willink

On 28/08/2012 16:25, Andrea Sindico wrote:
> My aim is not to iterate over the set. I need to do something only if
> a string (say 'test') is contained in the set. If the set does not
> contain that string I need to do something else.
> i.e.
>
>
> [if setOfString->select(??='test')->notEmpty()]
> generate something
> [else]
> generate something else
> [/if]
>
>
> How would you do that by means of an iterator?
>

Re: [Acceleo] select over a Set(String) object [message #904558 is a reply to message #904500]

Tue, 28 August 2012 13:20

Eclipse User

Thank you Ed I did not know that syntax

Regards

Andrea

Re: [Acceleo] select over a Set(String) object [message #904802 is a reply to message #904558]

Wed, 29 August 2012 03:24

Eclipse User

Andrea,

Ed's answer is right, I'll just add that you can also use iterators in select and reject operations with the same syntax he has outlined for "exists" :

[setOfString->select(s : String | s = 'test')]

i.e :

variable.operation(iterator | body)

. This same syntax exists for all 'iteration' operation : select, reject, collect, exists, forAll, isUnique, one, any and sortedBy.

Though of course, "includes" is better if you only need to check whether you set contains a given value.

Laurent Goubet
Obeo

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