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gf3/radar.coffee

Created December 11, 2011 07:21
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radar.coffee
# Find closest point to a set of points.
findClosestPoint = (needle, haystack) ->
(init = new Point).diff = Number.MAX_VALUE
comparator = (memo, point) ->
point.diff = Math.abs(needle.x - point.x) + Math.abs(needle.y - point.y)
if point.diff < memo.diff then point else memo
_.foldl haystack, comparator, init
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