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25 lines
782 B
25 lines
782 B
"use strict";
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var value = require("../../object/valid-value")
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, aFrom = require("../from")
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, toArray = require("../to-array")
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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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module.exports = function (/* …lists*/) {
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var lists, seen, result;
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if (!arguments.length) return aFrom(this);
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push.apply((lists = [this]), arguments);
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lists.forEach(value);
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seen = [];
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result = [];
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lists.sort(byLength).forEach(function (list) {
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result = result
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.filter(function (item) { return !contains.call(list, item); })
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.concat(filter.call(list, function (item) { return !contains.call(seen, item); }));
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push.apply(seen, toArray(list));
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});
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return result;
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};
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