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allenwb/Object.isAncestorOf

Created March 26, 2013 22:57
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Object.isAncestorOf
Object.isAncestorOf = function isAncestorOf(parent,child) {
if (child===null || child===undefined) return false;
if (parent === null) return true;
child = Object(child);
var proto = Object.getPrototypeOf(child);
if (proto === parent) return true;
return isAncestorOf(parent,proto);
}
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