Getting a Summary for an Attribute of Grouped Results
summary 可以用来获取平均值、计数等多个结果,不用每次重新获取刘对象
8 Matching Annotations
- Jul 2023
-
www.baeldung.com www.baeldung.com
-
-
A different application of the downstream collector is to do a secondary groupingBy to the results of the first group by.
不但可以 groupingBy(BlogPost::getAuthor, groupingBy(BlogPost::getType) 分组之后再分组;还可以 分组之后,再映射 groupingBy(BlogPost::getAuthor, tomap(BlogPost::getType,BlogPost::xxx) 第二个参数可以跟任何 collectors 里面的操作
Tags
Annotators
URL
-
- Mar 2023
-
boffosocko.com boffosocko.com
-
A zettelkasten with no quotes—by definition—shouldn’t carry the name. So let’s lay to rest that dreadful idea that quotes aren’t allowed in a zettelkasten.
This is fundamental. No research project has no quotes. Sometimes the words of the author is just better than anything that one could say.
-
- Mar 2022
-
www.iqsdirectory.com www.iqsdirectory.com
-
Drum or bag – a mechanism that requires replacement of the drum or bag that collects the matter.
-
- Dec 2020
-
cogdogblog.com cogdogblog.com
-
Jump in please and give the new TRU Collector a go.
I'm thinking I ought to make one as an experiment for my license plate project?
-
- Oct 2020
-
eds.a.ebscohost.com eds.a.ebscohost.com
-
Improving the way to Communicate Learning Activities to an Informal Learning Collector
CASAÑ, M. J., HIERRO, N., GALANIS, N., MAYOL, E., & ALIER, M. (2015). Improving the way to Communicate Learning Activities to an Informal Learning Collector. International Journal of Engineering Education, 31(3), 874–883.
Lifelong Learning has been a growing interest in e-learning research communities, in a similar way as other related kinds of learning (formal, non-formal and informal) already had. In fact, the Tagging Recognition and Acknowledgment of Informal Learning Experiences project proposes a framework to manage these types of learning, giving special attention to informal learning. This project gathers informal learning activities with an Informal Learning Collector. The main way for registering informal learning activities data into the Informal Learning Collector is using push mechanisms where the user explicitly introduces such information. In this paper, we present some evaluation of user opinions about this push communication mechanism, and propose an alternative way to communicate informal learning activities data, by using a pull mechanism. Using the pull mechanism, the Informal Learning Collector collects data directly from external applications. After the introduction of the pull mechanism, Informal Learning Collector users have confirmed that usability has been improved significantly.
-
- Jun 2020
-
news.ycombinator.com news.ycombinator.com
-
the focus here is to make it safe to have mutable data around, not to have manual memory management
Mutable data without memory management (no garbage collector)
Tags
Annotators
URL
-
- Jan 2014
-
blogs.msdn.com blogs.msdn.com
-
This sketch is complicated by the fact that there are actually three such arenas; the CLR collector is generational. Objects start off in the “short lived” heap. If they survive they eventually move to the “medium lived” heap, and if they survive there long enough, they move to the “long lived” heap. The GC runs very often on the short lived heap and very seldom on the long lived heap; the idea is that we do not want to have the expense of constantly re-checking a long-lived object to see if it is still alive. But we also want short-lived objects to be reclaimed swiftly.
-