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Fix for MutableLinkedList append! #871

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merged 3 commits into from
Oct 23, 2023
Merged

Fix for MutableLinkedList append! #871

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0149cc4
Correctly set previous and next nodes when appending
Sinfaen Sep 1, 2023
610f34d
Add test for checking that append! takes elements from second arg
Sinfaen Sep 1, 2023
940e11f
Merge branch 'JuliaCollections:master' into ll-fix-append
Sinfaen Oct 22, 2023
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Correctly set previous and next nodes when appending
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@Sinfaen
Sinfaen committed Sep 1, 2023
commit 0149cc4a7756c0995053a950a4c239de19a12447
6 changes: 6 additions & 0 deletions src/mutable_list.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -153,7 +153,13 @@ end
function Base.append!(l1::MutableLinkedList{T}, l2::MutableLinkedList{T}) where T
l1.node.prev.next = l2.node.next # l1's last's next is now l2's first
l2.node.prev.next = l1.node # l2's last's next is now l1.node
l2.node.next.prev = l1.node.prev # l2's first's prev is now l1's last
l1.node.prev = l2.node.prev # l1's first's prev is now l2's last
l1.len += length(l2)
# make l2 empty
l2.node.prev = l2.node
l2.node.next = l2.node
l2.len = 0
return l1
end

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