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How to create and handle composite primary key in JPA
...ddedId
private MyKey myKey;
@Column(name = "ColumnA")
private String columnA;
/** Your getters and setters **/
}
@Embeddable
public class MyKey implements Serializable {
@Column(name = "Id", nullable = false)
private int id;
@Column(name = "Version", nullable = fa...
Difference between Hive internal tables and external tables?
...t uses to keep track of state.
For instance, when you CREATE TABLE FOO(foo string) LOCATION 'hdfs://tmp/';, this table schema is stored in the database.
If you have a partitioned table, the partitions are stored in the database(this allows hive to use lists of partitions without going to the file-s...
Specify custom Date format for colClasses argument in read.table/read.csv
...
You can write your own function that accepts a string and converts it to a Date using the format you want, then use the setAs to set it as an as method. Then you can use your function as part of the colClasses.
Try:
setAs("character","myDate", function(from) as.Date(fr...
淘宝应对双\"11\"的技术架构分析 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...中一定是带了缓存控制的“命令”的，这包括URL中的query string，和HTTP头中的“If-None-Match”信息。并且，这个缓存控制“命令”一定会经过层层传递，最终传递到底层存储的异构“表”模块。各异构“表”除了返回各自的数据之...
How to get the seconds since epoch from the time + date output of gmtime()?
...t;>> calendar.timegm(time.gmtime())
1293581619.0
You can turn your string into a time tuple with time.strptime(), which returns a time tuple that you can pass to calendar.timegm():
>>> import calendar
>>> import time
>>> calendar.timegm(time.strptime('Jul 9, 2009 ...
Firefox Add-on RESTclient - How to input POST parameters?
...er needs to be set as per below image.
request body can be passed as json string in text area.
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format date with moment.js
I have a string in this format:
5 Answers
5
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How to convert java.sql.timestamp to LocalDate (java8) java.time?
...before any timestamp -> java.time conversion:
public static void main(String... args) {
TimeZone utcTimeZone = TimeZone.getTimeZone("UTC");
TimeZone.setDefault(utcTimeZone);
...
timestamp.toLocalDateTime().toLocalDate();
}
Or you can use toInstant.atZone chain:
timestamp.toIn...
What are “signed” cookies in connect/expressjs?
...d cookie is.
val is of course the value of the cookie, and secret is the string you add as option to cookie-parser
https://github.com/visionmedia/node-cookie-signature/blob/master/index.js#L16
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Superiority of unnamed namespace over static?
...o-translation-unit class declaration. It also allows e.g. external linkage string constant, to be used as template argument.
– Cheers and hth. - Alf
Dec 12 '10 at 16:18
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