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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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