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Convert column classes in data.table
...sing lapply and as.character:
dtnew <- dt[, lapply(.SD, as.character), by=ID]
str(dtnew)
Classes ‘data.table’ and 'data.frame': 10 obs. of 3 variables:
$ ID : Factor w/ 2 levels "A","B": 1 1 1 1 1 2 2 2 2 2
$ Quarter: chr "1" "2" "3" "4" ...
$ value : chr "1.487145280568" "-0.82...
What exactly is Hot Module Replacement in Webpack?
...t doesn't affect other modules
If HMR is disabled, all HMR code is removed by the compiler (wrap it in if(module.hot)).
Caveats
It's experimental and not tested so well.
Expect some bugs.
Theoretically usable in production, but it may be too early to use it for something serious.
The module IDs ...
Can I set max_retries for requests.request?
...ch only handles connection failures; errors after a connection is made are by default not handled as these could lead to side-effects).
Old answer, predating the release of requests 1.2.1:
The requests library doesn't really make this configurable, nor does it intend to (see this pull request). ...
Vim: How to insert in visual block mode?
How can you insert when you are in visual block mode (by pressing ctrl-V) in Vim?
4 Answers
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Coredata Error “data: ”
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you can turn off the property by calling [request setReturnsObjectsAsFaults:NO];
– Qamar Suleiman
Feb 20 '12 at 16:22
21
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What's the reason I can't create generic array types in Java?
...eter is not used in creation. There is no difference in the code generated by new ArrayList<SomeType>() or new ArrayList<String>() or new ArrayList() at all.
– newacct
Mar 26 '14 at 0:05
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How can I plot with 2 different y-axes?
... machine
Two different y axes on the same plot
(some material originally by Daniel Rajdl 2006/03/31 15:26)
Please note that there are very few situations where it is appropriate to use two different scales on the same plot. It is very easy to mislead the viewer of the graphic. Check the following...
How can I debug my JavaScript code? [closed]
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@NinaScholz Now all browsers come with jetpacks by default !
– oneCoderToRuleThemAll
Jan 31 '17 at 17:59
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Cron and virtualenv
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You should be able to do this by using the python in your virtual environment:
/home/my/virtual/bin/python /home/my/project/manage.py command arg
EDIT: If your django project isn't in the PYTHONPATH, then you'll need to switch to the right directory:
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How to determine if object is in array [duplicate]
...still a different object.
As mentioned in the comments, objects are passed by reference in JS and the same object can exist multiple times in multiple structures.
If you want to create a new object and check if the array contains objects identical to your new one, this answer won't work (Julien's fi...