uuid

I am starting to work with LOAD CSV of Cypher for Neo4J to import larger csv-files into my DB. I would like to add to each imported node a unique ID (uuid) as a property. My try was: LOAD CSV FROM "file:..." AS csvLine CREATE (c:Customer { uuid: {uuid}, name: csvLine[0], code: csvLine[1]}) Unfortunately I receive for each node the same UUID (although its a function that would normally generate the UUID new when called), it looks like the UUID is generated 1 time and then attached to each node while creating the node and parsing the csv-file. Is there a way to generate a new UUID for each

磁盘与文件管理工具 磁盘管理工具 fdisk fdisk命令用于观察硬盘实体使用情况，也可对磁盘进行添加、删除、转换分区等操作 语法 fdisk(选项)(参数) 选项 -b<分区大小>：指定每个分区的大小； -l：列出指定的外围设备的分区表状况； -s<分区编号>：将指定的分区大小输出到标准输出上，单位为区块； -u：搭配"-l"参数列表，会用分区数目取代柱面数目，来表示每个分区的起始地址； 参数 设备文件：指定要进行分区或者显示分区的硬盘设备文件。 实例 显示磁盘分区表状况 [root@localhost ~]# fdisk -l 磁盘 /dev/sda：21.5 GB, 21474836480 字节，41943040 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理)：512 字节 / 512 字节 I/O 大小(最小/最佳)：512 字节 / 512 字节 磁盘标签类型：dos 磁盘标识符：0x00005418 设备 Boot Start End Blocks Id System /dev/sda1 * 2048 2099199 1048576 83 Linux /dev/sda2 2099200 41943039 19921920 8e Linux LVM 磁盘 /dev/sdb：42.9 GB, 42949672960 字节

I am working on a new application and I need some help on how to implement the equals method and the hashCode method. I have been reading many questions already asked here on SO, and I have also read several blog posts that has lead me to this question. A little technical information first: I am using JPA (EclipseLink) and the application is for Java EE. After what I have read you should use immutable values for hashCode and equals, but since the fields in the class is usually modifiable you can't use them. Nor can you use the primary key (JPA) because you won't have one before you have

I use iphone UUID for checking user's device is unique. I already know UUID will be changed when reinstall app. But, I have a question. Then, when app updated, UUID for my app will be changed? If UUID changed when app updated, where can I save UUID in iphone permanently(or same effect)? Save out your created UUID into user preferences for the app, which should be backed up - if they restore the app from a backup you'll get back the UUID. If you want to be even more sure you can get back the same UUID, save the generated UUID into the keychain - the keychain is kept intact even after you delete

一、磁盘分区的配置 　　mbr与gpt的区别： 参考资料网站 https://zhidao.baidu.com/question/457998790987659965.html 二、什么是LVM 　　LVM(逻辑卷管理程序)，是Linux环境下对 磁盘分区 进行管理的一种机制。 　　 参考资料网站 https://baike.baidu.com/item/LVM/6571177?fr=aladdin 三、什么是挂载点 　　一棵大树(根目录/)有很多树枝(目录，挂载点)，每个树枝上都挂着一个箱子(分区，存储空间)。 四、基础命令 　　0.改变文件属性与权限： 　　　　chgrp：改变文件所属群组 chgrp 群组名 目录或文件 　　　　chown：改变文件拥有者 chown 账号名[账号名：群组名] 目录或文件 　　　　chmod：改变文件的权限 chmod xyz[ugoa +-= rwx] 目录或文件 　　1.文件与目录的监视： ls [-adl] [--full-time] [--time=atime,ctime] 文件名或目录名称 　　　　-a ： 全部文件，连同隐藏文件 　　　　-d ： 仅列出目录 　　　　-l ： 包含属性和权限。 　　　　full-time ： 显示完整时间 　　　　atime(access time),ctime(change time),mtime

I lost whole day fighting with something trivial, but now I just give up and need your help. In new Oreo API for reading app code/data/cache/ size we need storage UUID ( StorageStatsManager.queryStatsForUid(UUID storageUuid, int uid) ). The storage UUID is possible to fetch from StorageManager.getStorageVolumes() which returns list of all storages which contains also the UUIDs. And there the problem begins: The UUID from returned list is in String format while StorageStatsManager.queryStatsForUid(UUID storageUuid, int uid) requires UUID object - nothing simplier - there exist method UUID

This question already has answers here : How do I unit test code which uses Java UUID? (4 answers) Closed 2 years ago . I'm trying to test a Web Service method which connects to a SQL Server Database which contains JCR nodes, as we're using JackRabbit. The method looks like: public String addDocumentByJson(String fileName, byte[] fileContent, int status, String userName, String jsonProperties) { UUID id = UUID.randomUUID(); // It does a bunch of operations here return jsonResult; } Where jsonResult is an object similar to this one: { "id" : "<A random UUID>" "version" : 1 } Now, when I try to

I have a path to a partition. How can I retrieve UUID of that partition programatically without using terminal commands? An example will be more helpful. You can use the Disk Arbitration framework ( Apple reference ). There is also a good summary at this blog by Chris Suter. You can get the UUID by using the kDADiskDescriptionMediaUUIDKey. Aaron Burghardt described it well in this mailing list thread . Here is a quote from that link: Once you have the DADisk, use DADiskCopyDescription to get a dictionary of properties, in which you will find the UUID with the key kDADiskDescriptionMediaUUIDKey

UUID 1. 背景知识: 　　UUID: 通用唯一标识符 ( Universally Unique Identifier ), 对于所有的UUID它可以保证在空间和时间上的唯一性. 它是通过MAC地址, 时间戳, 命名空间, 随机数, 伪随机数来保证生成ID的唯一性, 有着固定的大小( 128 bit ). 它的唯一性和一致性特点使得可以无需注册过程就能够产生一个新的UUID. UUID可以被用作多种用途, 既可以用来短时间内标记一个对象, 也可以可靠的辨别网络中的持久性对象. 　　为什么要使用UUID? 　　很多应用场景需要一个id, 但是又不要求这个id 有具体的意义, 仅仅用来标识一个对象. 常见的例子有数据库表的id 字段. 另一个例子是前端的各种UI库, 因为它们通常需要动态创建各种UI元素, 这些元素需要唯一的id , 这时候就需要使用UUID了. 2. Python的uuid模块 　　python的uuid模块提供UUID类和函数uuid1(), uuid3(), uuid4(), uuid5() 来生成1, 3, 4, 5各个版本的UUID ( 需要注意的是: python中没有uuid2()这个函数). 对uuid模块中最常用的几个函数总结如下: 　　1. uuid.uuid1([node[, clock_seq]]) : 基于时间戳 　　使用主机ID, 序列号

I want to take type UUID and output it in a Base64 encoded format, however given the input methods on Base64 and outputs on UUID how to accomplish this doesn't seem obvious. update though not an explicit requirement for my use case, it would be nice to know if the method used uses the raw UUID (the 128 bits that a UUID actually is) of the UUID, as the standard hex encoding does. First, convert your UUID to a byte buffer for consumption by a Base64 encoder : ByteBuffer uuidBytes = ByteBuffer.wrap(new bytes[16]); uuidBytes.putLong(uuid.getMostSignificantBits()); uuidBytes.putLong(uuid