Manuscript (Case [Issue]20823) _Inbox - #sum on empty array results in SubscriptOutOfBounds error

Adam Elston opened Case 20823: #sum on empty array results in SubscriptOutOfBounds error and assigned it to Everyone: Bug in  _Inbox: Not Spam  •  You are subscribed to this case Version: Pharo 6.1 Minimal reproduction: #() sum. Expected: 0 Actual: SubscriptOutOfBounds. The error is in the #sum method on the Array class. It chooses a sample by calling #anyOne, but as the array is empty this results in an error. The reason I believe this should be fixed is that calling #sum on an empty array is a valid use case, particularly when using a method like #select. E.g. (myCollection select: [:i | i meetsSomeCriteria ]) sum , where none of the values in myCollection meet the criteria. Priority: 5 – Fix If Time Status: Work Needed Assigned to: Everyone Milestone: Later Go to Case No longer need updates? Unsubscribe from this case. Don't want Manuscript notifications anymore? Update your preferences.

A Manuscript case was opened by Adam Elston. Case ID: 20823 Title: #sum on empty array results in SubscriptOutOfBounds error Status: Work Needed Category: Bug Project: _Inbox Area: Not Spam Priority: 5 - Fix If Time Milestone: Later Assigned To: Everyone URL: https://pharo.manuscript.com/f/cases/20823 Version: Pharo 6.1 Minimal reproduction: #() sum. Expected: 0 Actual: SubscriptOutOfBounds. The error is in the #sum method on the Array class. It chooses a sample by calling #anyOne, but as the array is empty this results in an error. The reason I believe this should be fixed is that calling #sum on an empty array is a valid use case, particularly when using a method like #select. E.g. (myCollection select: [:i | i meetsSomeCriteria ]) sum , where none of the values in myCollection meet the criteria. You are subscribed to this case. If you do not want to receive automatic notifications in the future, unsubscribe (https://pharo.manuscript.com/default.asp?pre=preUnsubscribe&pg=pgEditBug&command=view&ixBug=20823) from this case.
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