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From "Milles, Eric (TR Technology & Ops)" <eric.mil...@thomsonreuters.com>
Subject Re: DGM for first or default
Date Thu, 18 Oct 2018 17:19:42 GMT
"list?.first() ?: defaultValue" is not the equivalent.  If the collection is empty, first()
throws an IndexOutOfBoundsException is thrown.  That's why I'm asking if there is a simple
equivalent.  I suppose this is the equivalent now that I think about it:


list ? list.first() : defaultValue


________________________________
From: ocs@ocs <ocs@ocs.cz>
Sent: Thursday, October 18, 2018 12:07 PM
To: dev@groovy.apache.org
Subject: Re: DGM for first or default

Myself, I am not a huge fan of adding not-often-needed functionalities (and actually would
add almost none of those discussed lately); nevertheless...

On 18 Oct 2018, at 6:48 PM, Paolo Di Tommaso <paolo.ditommaso@gmail.com<mailto:paolo.ditommaso@gmail.com>>
wrote:

-1, it can be easily done as:
list.first() ?: defaultValue

... this won't work in case the first object is a Groovy False (e.g., an empty string, or
a plethora of others).

All the best,
OC



p

On Thu, Oct 18, 2018 at 6:45 PM Daniel.Sun <sunlan@apache.org<mailto:sunlan@apache.org>>
wrote:
+0 from me.
P.S. we should add similar DGM for `last` too?

Cheers,
Daniel.Sun




-----
Daniel Sun
Apache Groovy committer
Blog: http://blog.sunlan.me<https://urldefense.proofpoint.com/v2/url?u=http-3A__blog.sunlan.me_&d=DwMFAg&c=4ZIZThykDLcoWk-GVjSLmy8-1Cr1I4FWIvbLFebwKgY&r=tPJuIuL_GkTEazjQW7vvl7mNWVGXn3yJD5LGBHYYHww&m=eCM29fHJoKqW_CdKJO2GxdVR6VMqldnDZ9NQgYxSo08&s=Kuqjwc4Pu38Y9C4Zooo3uBjDkGvyna3lloonS2m7GTE&e=>
Twitter: @daniel_sun

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