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Add Node.existingOrNewChildNode — recycles an existing node. Creates a new node only when needed.

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This commit is contained in:
Brent Simmons 2017-12-16 11:15:36 -08:00
parent b19d15ed3f
commit 0221eda956
1 changed files with 8 additions and 0 deletions
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8
Frameworks/RSTree/RSTree/Node.swift
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@ -81,6 +81,14 @@ public final class Node: Hashable {
return node
}
public func existingOrNewChildNode(with representedObject: AnyObject) -> Node {
if let node = childNodeRepresentingObject(representedObject) {
return node
}
return createChildNode(representedObject)
}
public func createChildNode(_ representedObject: AnyObject) -> Node {
// Just creates — doesn’t add it.