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9 lines
303 B
9 lines
303 B
"use strict" |
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module.exports = function (parentLayer, childLayer) { |
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if (!parentLayer.length && childLayer.length) return childLayer |
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if (parentLayer.length && !childLayer.length) return parentLayer |
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if (!parentLayer.length && !childLayer.length) return [] |
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return parentLayer.concat(childLayer) |
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}
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