Bug #15984: deleting from a collection while iterating on it

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: 2.6.3
• Backport: 2.4: UNKNOWN, 2.5: UNKNOWN, 2.6: UNKNOWN

[aothelal (Abdelrahman Othman Helal)]

If you tried to delete from a collection while iterating on it Ruby will allow you to do this flawlessly. This generates a wrong output collection after doing this action. An exception should be thrown to disallow this to be done.

[Hanmac (Hans Mackowiak)]

that totally depends on how you interate over the collection.

if you do it right, ruby has no problem with that

[shevegen (Robert A. Heiler)]

I don't think ruby should disallow this via an exception. The use case
seems fairly odd, too - it is often more idiomatic to do .map, .select,
.reject etc...

[alanwu (Alan Wu)]

This generates a wrong output collection after doing this action.

Could you provide some examples and explain exactly what is wrong with the output collection?

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Feedback

[jeremyevans0 (Jeremy Evans)]

• Status changed from Feedback to Closed