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Confusion: @NotNull vs. @Column(nullable = false) with JPA and Hibernate
...ption is available here: http://docs.jboss.org/hibernate/orm/5.0/userguide/html_single/Hibernate_User_Guide.html#configurations-mapping.
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How to map calculated properties with JPA and Hibernate
... to the article is: blog.eyallupu.com/2009/07/hibernate-derived-properties.html
– Adnan
Jan 17 '18 at 6:32
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社会化海量数据采集爬虫框架搭建 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...一套抓取规则肯定不行的，需要多个规则配合抓取。
5、html不完整，不完整就不能按照正常模式去扣取。这个时候用xpath肯定解析不了，我们可以先用htmlcleaner清洗网页后再解析。
6、 如果网站多起来，规则配置这个工作量也会...
How to set a Timer in Java?
...e constructor as public: docs.oracle.com/javase/7/docs/api/java/util/Timer.html#Timer() You might have a different Timer class in your classpath - try java.util.Timer as the class.
– andrewmu
Sep 2 '13 at 16:50
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Why is setTimeout(fn, 0) sometimes useful?
...the JSFiddle illustrating these examples: http://jsfiddle.net/C2YBE/31/ :
HTML code:
<table border=1>
<tr><td><button id='do'>Do long calc - bad status!</button></td>
<td><div id='status'>Not Calculating yet.</div></td>
&l...
android button selector
...using the xml refer this blazin.in/2016/03/how-to-use-selectors-for-botton.html i implemented as per this and its working
– Bhushan Shirsath
Mar 14 '16 at 12:45
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Why do some functions have underscores “__” before and after the function name?
...ixin):
def _worker(self):
self.res = self.render_string("template.html",
title = _("Title"),
data = self.application.db.query("select ... where object_id=%s", self.object_id)
)
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UTF-8: General? Bin? Unicode?
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Quoted from:
http://dev.mysql.com/doc/refman/5.0/en/charset-unicode-sets.html
For more detailed explanation, please read the following post from MySQL forums:
http://forums.mysql.com/read.php?103,187048,188748
As for utf8_bin:
Both utf8_general_ci and utf8_unicode_ci perform case-insensitive com...
Use CSS3 transitions with gradient backgrounds
....
Update
http://codersblock.blogspot.fr/2013/12/gradient-animation-trick.html?showComment=1390287622614
Here is a quick example:
Link state
.btn {
font-family: "Helvetica Neue", Arial, sans-serif;
font-size: 12px;
font-weight: 300;
position: relative;
display: inline-block;
text-de...
How does deriving work in Haskell?
...c is clearly specified at haskell.org/onlinereport/haskell2010/haskellch11.html.
– Wong Jia Hau
Feb 9 '19 at 9:02
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