大约有 550 项符合查询结果（耗时：0.0100秒） [XML]
Can table columns with a Foreign Key be NULL?
...insert a DEFAULT element in the other table. For example, any reference to uuid=00000000-0000-0000-0000-000000000000 on the other table would indicate no action. You also need to set all the values for that id to be "neutral", e.g. 0, empty string, null in order to not affect your code logic.
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SVN repository backup strategies
...switch the slave into primary position quite easily (only had to reset the UUID on the slave repository to the original).
Another benefit is that the sync can be run by a middle-man, rather than as a task on either server. I've had a client to two VPNs sync a repository between them.
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How to use regex with find command?
I have some images named with generated uuid1 string. For example 81397018-b84a-11e0-9d2a-001b77dc0bed.jpg. I want to find out all these images using "find" command:
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How to get a random number in Ruby
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If you're not only seeking for a number but also hex or uuid it's worth mentioning that the SecureRandom module found its way from ActiveSupport to the ruby core in 1.9.2+. So without the need for a full blown framework:
require 'securerandom'
p SecureRandom.random_number(100) #...
C++ 读写xml方法整理（持续更新） - C/C++ - 清泛网 - 专注C/C++及内核技术
...析库，支持xsd规范（即xml不符合xsd规定格式，则加载失败报错）。
#import <msxml6.dll> named_guids
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BOOL ParseXml::LoadXmlFile(MSXML2::IXMLDOMDocument2Ptr &pDoc, LPCTSTR lpXmlFile)
{
// create schema
MSXML2::IXMLDOMSchemaCollectionPtr pSchema;
pSchem...
windows版 svn 服务器搭建及总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的#，一定要同时将空格去掉，将每行顶到头。
svn却不会报错。
所以 这几张所截图都是错误的 开头都有空格，如果要去
链接svn的时候，就会报"权限认证失败"的错误。郁闷了很长时间才找到原因！
一 配置svnserve.conf文件...
How to do case insensitive string comparison?
... consider locale but if you are comparing machine generated values such as UUID then you might not. This why I use following function in my utils library (note that type checking is not included for performance reason).
function compareStrings (string1, string2, ignoreCase, useLocale) {
if (ign...
Best way to create unique token in Rails?
...lient id" to Google Analytics' measurement protocol. It's supposed to be a UUID, but I just take the first 32 chars of the hexdigest for any given IP.
– thekingoftruth
Jan 16 '15 at 19:22
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How to set a default value for a datetime column to record creation time in a migration?
... @SandipSubedi I realized that 5 minutes after my comment. Just like with uuid generation. Thanks!
– courtsimas
Aug 5 '19 at 19:07
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How do you serialize a model instance in Django?
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this fails with UUID fields, should be clear otherwise
– Alvin
Mar 7 '17 at 23:21
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