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How to map a composite key with JPA and Hibernate?
...h EmbeddedId
select t.timePK.levelStation from Time t
References
JPA 1.0 specification
Section 2.1.4 "Primary Keys and Entity Identity"
Section 9.1.14 "EmbeddedId Annotation"
Section 9.1.15 "IdClass Annotation"
...
Android Camera : data intent returns null
...change three files for my purpose:
activity_main.xml :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="m...
What's the difference between == and .equals in Scala?
...
So why new java.lang.Integer(1) == new java.lang.Double(1.0) is true while new java.lang.Integer(1) equals new java.lang.Double(1.0) is false?
– Eastsun
Sep 13 '16 at 1:03
...
What is a difference between
... {1,2,3,4,5};
Long[] myLongs = {1L, 2L, 3L, 4L, 5L};
Double[] myDoubles = {1.0, 2.0, 3.0, 4.0, 5.0};
System.out.println(sum(myInts));
System.out.println(sum(myLongs));
System.out.println(sum(myDoubles));
But if you attempt to implement the same code with generic collections, you will not succeed:
...
How to make div background color transparent in CSS
...ue with color and 100% transparency*/
background-color: hsla(50, 33%, 25%, 1.00); /* 100% transparent */
/* RGB value with color and 100% transparency*/
background-color: rgba(117, 190, 218, 1.0); /* 100% transparent */
...
Generate random numbers uniformly over an entire range
...e you a negative value. Better to do something like: ((double)RAND_MAX) + 1.0
– Demi
Feb 2 '10 at 5:08
3
...
How to make rounded percentages add up to 100%
...ython looks like this.
def error_gen(actual, rounded):
divisor = sqrt(1.0 if actual < 1.0 else actual)
return abs(rounded - actual) ** 2 / divisor
def round_to_100(percents):
if not isclose(sum(percents), 100):
raise ValueError
n = len(percents)
rounded = [int(x) for...
Django Cookies, how can I set them?
...ss helper function were already useless in 2009. docs.djangoproject.com/en/1.0/ref/request-response/… (django 1.0 was released sept 2008, as far as i know)
– fetzig
Jan 24 '12 at 14:31
...
得合伙人者得天下：腾讯五虎、新东方三驾马车、携程四君子、复旦五虎 - 资...
...到争执的话很容易出问题。”
新东方三驾马车：真实版“中国合伙人”
学校：北京大学
创业者：俞敏洪、徐小平、王强
新东方昔日“三驾马车”中，俞敏洪和王强1980年一同考进北京大学西语系英语专业，两人风格完全不...
多媒体组件 · App Inventor 2 中文网
...的值会提高合成语音的音调。
正常音高的默认值为 1.0。
结果
如果文本成功转换为语音，则返回真，否则返回假。
语速
设置 语音识别器 的语音语速。
这些值应介于 0 和 2 之间，较低的值会减慢音调，较大的值...