[GROOVY-1548] Iterator and Enumeration have no toList() method

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0-JSR-6
• Fix Version/s: 1.5
• Component/s: groovy-jdk
• Environment: OS X 10.4.8, Java 1.5
• Assignee: Paul King
• Reporter: Marc Palmer
• Created: 05/Nov/06 15:13
• Updated: 22/Dec/07 07:07
• Resolved: 30/Nov/07 23:15

Description

I discovered today to my surprise that Iterator (and I presume Enumeration) does not have a toList() method, and that there is no coercion to list:

groovy> assert [1,2,3,4].iterator() == [1,2,3,4]

Exception thrown: java.lang.AssertionError: Expression: ([1, 2, 3, 4].iterator() == [1, 2, 3, 4])

so you try to write it using iterator().toList():

groovy> assert [1,2,3,4].iterator().toList() == [1,2,3,4]

Exception thrown: groovy.lang.MissingMethodException: No signature of method java.util.AbstractList$Itr.toList() is applicable for argument types: () values: {}

Still no joy, so you are left having to do:

groovy> assert [1,2,3,4].iterator().findAll()

{ true }

== [1,2,3,4]

...which is rather ugly.