| 123456789101112131415161718 | var slice = require('../array/slice');    /**     * Return a copy of the object, filtered to only have values for the whitelisted keys.     */    function pick(obj, var_keys){        var keys = typeof arguments[1] !== 'string'? arguments[1] : slice(arguments, 1),            out = {},            i = 0, key;        while (key = keys[i++]) {            out[key] = obj[key];        }        return out;    }    module.exports = pick;
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