genetate_uuidv4.js

/**
 * UUIDv4を作成
 *
 * @see {@link https://stackoverflow.com/questions/105034/create-guid-uuid-in-javascript/2117523#2117523}
 * @returns {string} UUIDv4の文字列
 */
var generateUUIDv4 = function () {
    var uuid = '';
    for (var i = 0; i < 36; i++) {
        if (i === 8 || i === 13 || i === 18 || i === 23) {
            uuid += '-';
        } else if (i === 14) {
            uuid += '4';
        } else {
            var r = Math.random() * 16 | 0;
            var v = i !== 20 ? r : (r & 0x3 | 0x8);
            uuid += v.toString(16);
        }
    }
    return uuid;
};