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Factors in R: more than an annoyance?
... factors easily with droplevels() to drop unused factor levels for an individual factor or for every factor in a data.frame (since R 2.12):
x <- subset(iris, Species == 'setosa')
levels(x$Species)
# [1] "setosa" "versicolor" "virginica"
x <- droplevels(x)
levels(x$Species)
# [1] "setosa"...
How do I make a reference to a figure in markdown using pandoc?
...ately this is not a very flexible way of doing it. One cannot specify the width or height of the image this way. Is it possible to include PDFs that way? If not that would also be a downside, since it is preferable in the PDF as output case.
– Zelphir Kaltstahl
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Xcode changes unmodified storyboard and XIB files
...Open the storyboard file, and find something like this
<viewController id=”ory-XY-OBM” sceneMemberID=”MyController1”>.
You can safely commit only changes in this section and ignore everything else. If you changed segues or constraints, also commit anything that has “ory-XY-OBM” in...
Will Dart support the use of existing JavaScript libraries?
... JavaScript, and I read the Dart Language Spec on Libraries, although I didn't see an answer there. Also a search on their discussion form for the word 'existing' turns up 3 results that are not related.
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“tag already exists in the remote" error after recreating the git tag
...or update hooks (whichever hooks exist on the remote). Those hooks can decide whether to allow or reject the tag create/delete/update.
The old-sha1 value is the all-zeros "null" SHA-1 if the tag is being created. The new-sha1 is the null SHA-1 if the tag is being deleted. Otherwise both SHA-1 va...
Adding additional data to select options using jQuery
...
HTML Markup
<select id="select">
<option value="1" data-foo="dogs">this</option>
<option value="2" data-foo="cats">that</option>
<option value="3" data-foo="gerbils">other</option>
</select>
C...
Class method decorator with self arguments?
...wered Jul 30 '12 at 23:38
li.davidmli.davidm
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Why can't C compilers rearrange struct members to eliminate alignment padding? [duplicate]
Consider the following example on a 32 bit x86 machine:
11 Answers
11
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Check if pull needed in Git
... pull", and the other two as "don't need to pull".
You can get the commit id of any ref using git rev-parse <ref>, so you can do this for master and origin/master and compare them. If they're equal, the branches are the same. If they're unequal, you want to know which is ahead of the other. U...
Java: Best way to iterate through a Collection (here ArrayList)
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I didn't say that those wouldn't work, but if by any chance a certain improvements or performance changes are done for the implementations of collections, then it would automatically apply for your code and you don't need to wri...