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

Tue, 28 August 2012 14:42

Andrea Sindico

Messages: 266
Registered: November 2010

Senior Member

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?

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

Tue, 28 August 2012 14:54

Ed Willink

Messages: 7492
Registered: July 2009

Senior Member

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?

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

Tue, 28 August 2012 15:25

Andrea Sindico

Messages: 266
Registered: November 2010

Senior Member

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?

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

Tue, 28 August 2012 16:46

Ed Willink

Messages: 7492
Registered: July 2009

Senior Member

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?
>

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

Tue, 28 August 2012 17:20

Andrea Sindico

Messages: 266
Registered: November 2010

Senior Member

Thank you Ed I did not know that syntax

Regards

Andrea

Follow me on Twitter @andreasindico

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

Wed, 29 August 2012 07:24

Laurent Goubet

Messages: 1897
Registered: July 2009

Senior Member

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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