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Unsure if I understand TransactionAwarePersistenceManagerFactoryProxy
...k with a plain JDO PersistenceManagerFactory . Another question is: what happens if the proxy doesn't get made properly? Can I still use it to access my factory to create a transaction aware persistence manager? If the object managed by the factory is a singleton, does this change things? Why not j...
数据分析非要用到大数据？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...看看自己的企业处于什么阶段：
对于电子渠道(网站、APP)仅仅只是作为品牌展示功能的企业，那大数据很可能与其没多大关系!
企业如何才能在大数据中获取价值?
有很多因素显示你的企业已经准备好从小数据的价值获取发展...
手把手教你如何加入主流DSP广告联盟 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...旅行等。只提供推广url，广告主体由站长自定义。
手机app使用相关。
这里只介绍SSP推广位的添加方法，其他的类推。另外，具体应该推广那些内容这个需要站长不断尝试、积累经验方能取得好的效果。
1、先添加网站：
...
模拟器怎么让程序重新加载？不用重置连接，一个菜单就搞定 - AI 助手 - 清...
...身已经断开或异常，需要先重新建立连接
调研作者：App Inventor 2 中文网 ai2claw
更多教程和资源：https://www.fun123.cn
Search stops working for “Entire Solution”
...+Break, paying attention to releasing Break first. It doesn't matter which application is active.
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Difference between Bridge pattern and Adapter pattern
...t you don't get an insane number of classes. Let's say you have:
MemoryMappedFile and DirectReadFile types of file objects. Let's say you want to be able to read files from various sources (Maybe Linux vs. Windows implementations, etc.). Bridge helps you avoid winding up with:
MemoryMappedWi...
Using different Web.config in development and production environment
...different database connection string and SMTP server address in my ASP.NET application depending on it is run in development or production environment.
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“Keep Me Logged In” - the best approach
My web application uses sessions to store information about the user once they've logged in, and to maintain that information as they travel from page to page within the app. In this specific application, I'm storing the user_id , first_name and last_name of the person.
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Django templates: verbose version of a choice
...
My apologies if this answer is redundant with any listed above, but it appears this one hasn't been offered yet, and it seems fairly clean. Here's how I've solved this:
from django.db import models
class Scoop(models.Model):
FLAVOR_CHOICES = [
('c', 'Chocolate'),
('v', 'Va...
How to save a PNG image server-side, from a base64 data string
...Because of this PHP has a native way to handle such data - "data: stream wrapper" (http://php.net/manual/en/wrappers.data.php)
So you can easily manipulate your data with PHP streams:
$data = 'data:image/gif;base64,R0lGODlhEAAOALMAAOazToeHh0tLS/7LZv/0jvb29t/f3//Ub//ge8WSLf/rhf/3kdbW1mxsbP//mf///yH...