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127 Return code from $?
...her words, the system doesn't understand your command, because it doesn't know where to find the binary you're trying to call.
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Count number of rows within each group
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I don't know but this could be useful as well... df %>% group_by(group, variable) %>% mutate(count = n())
– Manoj Kumar
Dec 14 '16 at 17:57
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Jquery bind double click and single click separately
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use .on() over both of those now
– Claudiu
Sep 4 '12 at 15:40
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Read/Write 'Extended' file properties (C#)
...'t
edit its Author or Title property.
Open it with Word, edit and save
it. Now you can.
So just make sure to use some try catch
Further Topic:
MSDN: Implementing Property Handlers
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Standard deviation of a list
... function _sum rather than the built-in sum which I've used in its place.
Now we have for example:
>>> mean([1, 2, 3])
2.0
>>> stddev([1, 2, 3]) # population standard deviation
0.816496580927726
>>> stddev([1, 2, 3], ddof=1) # sample standard deviation
0.1
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Nodejs cannot find installed module on Windows
...anks very much, the links you provided are very helpful, I am much clearer now, although the module-searching algorithm looks a bit complicated. Finally I use the environment variable NODE_PATH to reference the global module path, set NODE_PATH=C:\Documents and Settings\DevUser\Application Data\npm\...
Using jQuery to center a DIV on the screen
... $(window).scrollLeft()) + "px");
return this;
}
Now we can just write:
$(element).center();
Demo: Fiddle (with added parameter)
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Download old version of package with NuGet
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This command should also be available via the UI. Now if a publisher has a beta version, you can only get that latest version, which is sometimes unstable.
– Bart Verkoeijen
Feb 12 '12 at 10:27
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git push local branch with same name as remote tag
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Had unknowingly named a tagged release master and could no longer push to the branch with the same name. git push origin refs/heads/master did the trick (then I deleted that tag so it'd stop happening).
– tres...
Access restriction: The type 'Application' is not API (restriction on required library rt.jar)
...ually right about what is and what isn't part of the public API.
Problem
Now, there can be situations, where you want to use public Non-API, like sun.misc (you shouldn't, unless you know what you're doing). And there can be situations, where Eclipse is not really right (that's what happened to me,...