"use strict";
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var value = require("../../object/valid-value")
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, contains = require("./contains")
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, byLength = require("./_compare-by-length")
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, filter = Array.prototype.filter
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, push = Array.prototype.push
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, slice = Array.prototype.slice;
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module.exports = function (/* …list*/) {
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var lists;
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if (!arguments.length) slice.call(this);
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push.apply((lists = [this]), arguments);
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lists.forEach(value);
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lists.sort(byLength);
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return lists.reduce(function (list1, list2) {
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return filter.call(list1, function (item) { return contains.call(list2, item); });
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});
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};
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