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"use strict";

/**
 * protocols
 * Returns the protocols of an input url.
 *
 * @name protocols
 * @function
 * @param {String} input The input url.
 * @param {Boolean|Number} first If `true`, the first protocol will be returned. If number, it will represent the zero-based index of the protocols array.
 * @return {Array|String} The array of protocols or the specified protocol.
 */
module.exports = function protocols(input, first) {

    if (first === true) {
        first = 0;
    }

    var index = input.indexOf("://"),
        splits = input.substring(0, index).split("+").filter(Boolean);

    if (typeof first === "number") {
        return splits[first];
    }

    return splits;
};