I’ll share some of mine from a single game project. Note this hasn’t been
converted to Swift 3 and this is not all of them - just a varied sampling:
for location in random.sample(map, density: 0.007) where
map.allowsGrassAt(location) && !map.hasGrassAt(location) {
}
for location in type.designatedLocations where location.z == Global.cameraZ &&
!locations.contains(location) {
}
for location in region where location.z == mouseLocation.z {
}
for location in path where location.z == Global.cameraZ {
}
for below in location.below.cardinals where contains(below) &&
hasSurfaceAt(below) {
}
for neighbor in location.cardinals where contains(neighbor) &&
isRampAt(neighbor) && !isFloorAt(neighbor.above) {
}
for neighbor in cardinals where contains(neighbor) && !isSolidAt(neighbor) {
}
for console in consoles.reverse() where console.hitTest(vector) {
}
And these 2 made good use, IMO, of “if-where” but I think that’s no longer in
Swift 3? :/
if let there = debugClickedSurfaceAt, here = mouseSurface where
Global.debugPathTest {
}
if let here = mouseAt where Global.debugWalkNeighbors {
}
l8r
Sean
> On Jun 24, 2016, at 8:24 AM, Erica Sadun via swift-evolution
> <[email protected]> wrote:
>
> Thank you for collecting and sharing these.
>
> I suspect both of us look at these and say "Ah yes, this supports exactly
> what I've been saying".
>
> -- E
>
>> On Jun 23, 2016, at 11:59 PM, William Shipley <[email protected]> wrote:
>>
>> 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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