Here are some of my real-world examples:

        for modelUUIDAndInterfaceElement in modelUUIDsToInterfaceElements where 
!usedInterfaceElements.contains(modelUUIDAndInterfaceElement.1) {
…
        }

        for anchor in wall.anchors where boundsRect.contains(anchor.origin) {
…
        }

        for otherWall: Wall in self where otherWall != wall && 
!removedWalls.contains(otherWall) {
…
        }

        for wall in self as Set<Wall> {
            for otherWall in self as Set<Wall> where otherWall != wall {
…
            }
        }

        for wall in self as Set<Wall> where !checkedWalls.contains(wall) {
…
        } 

(x2 on that one)

        for otherPieceOfFurnitureNode in 
localFurnitureModelUUIDsToInterfaceElements!.values where 
otherPieceOfFurnitureNode !== pieceOfFurnitureNode {
…
        }

        for lineSegmentObject in wallRelatedLineSegments where 
remainingLineSegments.contains(lineSegmentObject) {
…
        }

        for colinearLineSegmentObject in remainingLineSegments where 
colinearLineSegmentObject.angle.isEssentially(infiniteLineAngle: 
lineSegmentObject.angle) {
…
        }


I think this is basically as many as are found on all of github?

-W
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