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How to sort a dataframe by multiple column(s)
... Easy enough: dd[ order(-dd[,4], dd[,1]), ], but can't use with for name-based subsetting.
– Dirk Eddelbuettel
Oct 21 '12 at 14:34
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The Use of Multiple JFrames: Good or Bad Practice? [closed]
...veloping an application which displays images, and plays sounds from a database. I'm trying to decide whether or not to use a separate JFrame to add images to the database from the GUI.
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Is there a limit to the length of HTML attributes?
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HTML5 is not an SGML-based language.
– William Brendel
Sep 30 '09 at 5:03
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Hiding user input on terminal in Linux script
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I've got it. My FreeBSD test was based on the code copied and pasted from your original mistaken edit of lesmana's post, which contains one important difference: you had been passing read a -d ''. When I retried it later on Linux I used the reposted version....
What is the difference between instanceof and Class.isAssignableFrom(…)?
... performance:
isInstance
instanceof (+ 0.5%)
isAssignableFrom (+ 2.7%)
Based on a benchmark of 2000 iterations on JAVA 8 Windows x64, with 20 warmup iterations.
In theory
Using a soft like bytecode viewer we can translate each operator into bytecode.
In the context of:
package foo;
public c...
AngularJS UI Router - change url without reloading state
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+100
Simply ...
ros 基本调试 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的kdcom.dll文件，编译的时候还需要加上WINDK=1开关。而在64位的ros上，windbg是最主要的调试方法，和x64版本的kdcom.dll有很好的兼容性。
生成更多输出
如果想要得到更多有意义的输出，有必要额外开启verbosity功能。
编译时开启ver...
Django TemplateDoesNotExist?
...ed anywhere, so I do not think that this answer will work. Maybe you meant BASE_DIR
– sofly
Feb 3 '16 at 21:05
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Chrome Dev Tools - “Size” vs “Content”
...ritten as KB. It would be better if they reported it either in ISO format (base 10) or write it as KiB/MiB.
– okdewit
Jun 15 '16 at 13:43
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AWS MySQL RDS vs AWS DynamoDB [closed]
...r while MySQL is used for relational storage. You should pick what to use based on the actual needs of your application. In fact, some applications might be well served by using both.
If, for example, you are storing data that does not lend itself well to a relational schema (tree structures, sche...