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How to combine multiple conditions to subset a data-frame using “OR”?
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filter(df, v1 < 0.5 | v2 == "g")
Using sqldf:
library(sqldf)
sqldf('SELECT *
FROM df
WHERE v1 < 0.5 OR v2 = "g"')
Output for the above options:
v1 v2
1 0.26550866 a
2 0.37212390 b
3 0.20168193 e
4 0.94467527 g
5 0.06178627 j
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Auto Generate Database Diagram MySQL [closed]
...the beginning of every project. Is there a tool out there that will let me select specific tables and then create a database diagram for me based on a MySQL database? Preferably it would allow me to edit the diagram afterward since none of the foreign keys are set...
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Recent file history in Vim?
...a lot of keys.. first to get a list of files, then to press q, and then to select a number. I believe the MRU plugin mentioned below is much better: stackoverflow.com/a/3171323/4752883 you have to press <leader> f, then either browse to the file with hjkl or other keys/search for the file nam...
Hudson vs Jenkins in 2012 [closed]
...tware they're installing.
Every three months or so, a previous release is selected which has been deemed as working well by the community of Jenkins users. This version is then branched, any important fixes (which have been "battle-tested") are backported into this Jenkins version, and then this r...
How to stop an app on Heroku?
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Go to your dashboard on heroku. Select the app. There is a dynos section. Just pull the sliders for the dynos down, (a decrease in dynos is to the left), to the number of dynos you want to be running. The slider goes to 0. Then save your changes. Boom.
Acc...
How to “set a breakpoint in malloc_error_break to debug”
...Navigator or ⌘8), clicking the plus button in the lower left corner, and selecting "Add Symbolic Breakpoint". In the popup that comes up, enter malloc_error_break in the Symbol field, then click Done.
EDIT: openfrog added a screenshot and indicated that he's already tried these steps without succe...
Start/Stop and Restart Jenkins service on Windows
... To run cmd in admin mode 1. Open task manager 2. File - New Task 3. Select check box "Create task with admin previleges"
– Amit Jain
Jul 19 '18 at 6:01
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How to access class constants in Twig?
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@DamianPolac do you know PHPStorm will prompt variable selection in twig file?
– Codium
Jun 21 at 8:38
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How to add http:// if it doesn't exist in the URL?
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This should be the selected answer - why roll your own when the language has native support? Nice work.
– Tom Auger
Aug 19 '13 at 15:24
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Getting the path of the home directory in C#?
...OSs do you need to support? You may need to do some simple OS detection to select the method for finding the home directory if you're running on a non-Windows OS.
This website seems to give a way to do what you need in Windows.
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