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32 lines
1.0 KiB
JavaScript
32 lines
1.0 KiB
JavaScript
/**********************************************************************
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*
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*
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*
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**********************************************/ /* c8 ignore next 2 */
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((typeof define)[0]=='u'?function(f){module.exports=f(require)}:define)
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(function(require){ var module={} // make module AMD/node compatible...
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/*********************************************************************/
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/*********************************************************************/
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// Set set operation shorthands...
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Set.prototype.unite = function(other){
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return new Set([...this, ...other]) }
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Set.prototype.intersect = function(other){
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var test = other.has ? 'has' : 'includes'
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return new Set([...this]
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.filter(function(e){ return other[test](e) })) }
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Set.prototype.subtract = function(other){
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other = new Set(other)
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return new Set([...this]
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.filter(function(e){ return !other.has(e) })) }
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/**********************************************************************
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* vim:set ts=4 sw=4 : */ return module })
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