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Are foreign keys really necessary in a database design?
...m, but may be it's there... The most of databases use a convention like id_xxx that is exactly the same that ixXXX
– FerranB
Feb 5 '09 at 21:54
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When is the @JsonProperty property used and what is it used for?
...sSet". This is because as per Java Beans specification, methods of form "isXxx" and "setXxx" are taken to mean that there is logical property "xxx" to manage.
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Why isn't my Pandas 'apply' function referencing multiple columns working? [closed]
... 0.044698
1 -2.163236 bar -2.046438 -0.116798
2 -0.199115 foo -0.458050 -0.199115
3 0.918646 bar -0.007185 -0.001006
4 1.336830 foo 0.534292 0.268245
5 0.976844 bar -0.773630 -0.570417
BTW, in my opinion, following way is more elegant:
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2015年硅谷最火的高科技创业公司都有哪些 - 资讯 - 清泛网 - 专注C/C++及内核技术
...面有很多可以结合，比如提供高可靠平台支持大规模用户在线并发访问，利用数据挖掘分析学生行为做个性化课程学习，并提高课程满意度，通过机器学习识别作业，互相评判，用技术让人们平等便捷的获取教育服务。
Cours...
how to get the last character of a string?
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DonutDonut
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YAML current date in rmarkdown
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SabDeMSabDeM
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Access an arbitrary element in a dictionary in Python
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91
That only works in Python 2.x, for 3.x you have to use list(my_dict.keys())[0]
– alldayremix
Oct 8 '...
linq query to return distinct field values from a list of objects
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Malice
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answered Jun 3 '11 at 18:53
Jon SkeetJon Skeet
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View markdown files offline [closed]
...e link at the bottom of your answer does not exist
– xxx---
Dec 29 '18 at 17:33
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How can I “pretty print” a Duration in Java?
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Joda Time has a pretty good way to do this using a PeriodFormatterBuilder.
Quick Win: PeriodFo...