大约有 3,576 项符合查询结果(耗时:0.0173秒) [XML]
Editing legend (text) labels in ggplot
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The tutorial @Henrik mentioned is an excellent resource for learning how to create plots with the ggplot2 package.
An example with your data:
# transforming the data from wide to long
library(reshape2)
dfm <- melt(df, id = "TY")
# creating a scatterplot
gg...
Why is super.super.method(); not allowed in Java?
...ion to comment so I will add this to the other answers.
Jon Skeet answers excellently, with a beautiful example. Matt B has a point: not all superclasses have supers. Your code would break if you called a super of a super that had no super.
Object oriented programming (which Java is) is all about...
Best way to make Java's modulus behave like it should with negative numbers?
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@eitanfar I've included your excellent explanation into the answer (with a minor correction for a < 0, maybe you could have a look)
– Maarten Bodewes
Sep 13 '14 at 10:46
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How to make junior programmers write tests? [closed]
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+1 I think this is an excellent low impact way to start testing. This way, known bugs never get re-introduced accidentally.
– Jonathan
Apr 8 '09 at 9:00
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Rounded UIView using CALayers - only some corners - How?
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@StuDev excellent! I had gone with a subview for the shadow view but this is much nicer! Didn't think to add sub layers like this. Thanks!
– Chris Wagner
Nov 7 '11 at 19:28
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When should I use ugettext_lazy?
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An excellent use of _noop, is when you want to log a message in English for the developers, but present the translated string to a viewer. An example of this is at http://blog.bessas.me/posts/using-gettext-in-django/
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REST Complex/Composite/Nested Resources [closed]
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@ray, excellent discussion
@jgerman, don't forget that just because it's REST, doesn't mean resources have to be set in stone from POST.
What you choose to include in any given representation of a resource is up to you.
Your cas...
What's the difference of ContentType and MimeType
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The reason isn't only backward compatibility, and I'm afraid the usually excellent Django documentation is a bit hand-wavy about it. MIME (it's really worth reading at least the Wikipedia entry) has its origin in extending internet mail, and specifically SMTP. From there, the MIME and MIME-inspire...
Why does AngularJS include an empty option in select?
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@MarkRajcok - excellent suggestion! i have stumbled on another issue using your example with transcluding directive. Could you please have a look? plnkr.co/edit/efaZdEQlNfoDihk1R1zc?p=preview
– Jan-Terje Sørensen
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What Java ORM do you prefer, and why? [closed]
...ava and was one of the driving forces in the creation of the JPA. It's got excellent support in Spring, and almost every Java framework supports it. Finally, GORM is a really cool wrapper around it doing dynamic finders and so on using Groovy.
It's even been ported to .NET (NHibernate) so you can u...