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Why do I need Transaction in Hibernate for read-only operations?
...nsactions can be optimized by DBs, but this of course is DB specific. E.g. MySQL added support for this only in InnoDB starting from 5.6.4 version.
If you're not using JDBC directly, but rather an ORM, that might be problematic. For instance Hibernate community says that working outside of transacti...
setuptools: package data folder location
...stall as package data
The main advantage of placing data files inside the root of your Python package
is that it lets you avoid worrying about where the files will live on a user's
system, which may be Windows, Mac, Linux, some mobile platform, or inside an Egg. You can
always find the directory da...
How do I git rebase the first commit?
...as been out for a long time now so you should have this):
git rebase -i --root
The other easy way, as twalberg noted in a comment, is to use git checkout --orphan to set up to make a new root commit, which you can copy the old commits on top of. (This is what rebase -i --root ends up doing inter...
What's the difference between an inverted index and a plain old index?
... of procedures which have been done in order to speed up application (e.g. MySQL or other RDBMS Consult MySQL the docs). Indexing can also be related to caching etc.
Inverted index creates file with structure that is primarily intender for (fulltext) searching.
Inverted index consists of two main...
乐视全员合伙人制的背后 - 资讯 - 清泛网 - 专注C/C++及内核技术
...要出资购买，这意味着收益接近股份的全价值。
而对于如何在激励计划上兼顾部门利益和部门间的协作，乐视的做法是：无论员工属于业务子公司还是乐视控股，激励的最终价值都将来自于生态价值的整体提升。据了解，具体...
地图组件（高德地图） · App Inventor 2 中文网
...他位置，例如在屏幕外添加 标记，则可以使用“将地图重置为初始边界”按钮将 地图 重新置于起始位置的中心。
属性
自定义URL
支持XYZ格式的地图URL。XYZ格式是一种瓦片地图服务，将地图分成无数个小...
Favicons - Best practices
...You should include the msapplication-config meta tag for when it is not in root directory: <meta name="msapplication-config" content="../path/to/browserconfig.xml">
– Rick Davies
Aug 21 '14 at 4:21
...
How to set Java environment path in Ubuntu
.../man/man1/java.1.gz
Now dig deeper-
$ ls -l /usr/bin/java
lrwxrwxrwx 1 root root 46 Aug 25 2018 /etc/alternatives/java -> /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
Dig deeper:
$ ls -l /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
-rwxr-xr-x 1 root root 6464 Mar 14 18:28 /usr/lib/jvm...
Cron and virtualenv
... SHELL environment variable to be /bin/bash:
SHELL=/bin/bash
*/10 * * * * root source /path/to/virtualenv/bin/activate && /path/to/build/manage.py some_command > /dev/null
It's tricky to spot why this fails as /var/log/syslog doesn't log the error details. Best to alias yourself to ro...
Google Tag Manager 入门指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...用Tag Manager之前，我们先看看没有这个工具之前，我们是如何管理Tag脚本的。
Step 1：
按照Google Analytics的配置要求，我们把如下的脚本放到网站全局的页脚，如：footer.inc：
<script type=”text/javascript”>
var _gaq = _gaq || [];
_gaq....