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Why does pattern matching in Scala not work with variables?
...te constants. So a pattern matching on an uppercase identifier is taken to mean comparing to a constant. It seriously helps with stuff like Nil, which I bet is the real reason.
– Daniel C. Sobral
Aug 16 '11 at 22:11
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How do I “un-revert” a reverted Git commit?
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A revert commit is just like any other commit in git. Meaning, you can revert it, as in:
git revert 648d7d808bc1bca6dbf72d93bf3da7c65a9bd746
That obviously only makes sense once the changes were pushed, and especially when you can't force push onto the destination branch (whi...
Bash: Copy named files recursively, preserving folder structure
...s as they're processed). The '-m' preserves modification times. The '-B' means use 'big blocks' (where big blocks are 5120 bytes instead of 512 bytes); it is possible it has no effect these days.
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Comment out text in R Markdown (Rmd file)
...hin those html comments tries to evaluate. e.g., <-- Some text with `r mean(x)` inline code --> can result in 'blah not Found' errors on Knit due to the inline code being unexpectedly evaluated.
– Brian D
May 1 '19 at 14:39
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How can I get list of values from dict?
...timeit list(big_df.values())
Small Dict(str)
256 ns ± 3.37 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each)
338 ns ± 0.807 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each)
336 ns ± 1.9 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each)
Small Dict(float)
268...
Why does “git difftool” not open the tool directly?
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Actually the --add option is misplaced here. It means to add the setting "prompt=false" to whatever entries of "promt" are there already, whereas the goal is to replace the current value or add it in the first place. This behaviour is achieved without --add.
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@Nullable annotation usage
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Different tools may interpret the meaning of @Nullable differently. For example, the Checker Framework and FindBugs handle @Nullable differently.
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How to trigger a build only if changes happen on particular set of files
...l return 1 for changes (failure) which is caught in catch, or
// 0 meaning no changes
sh "git diff --quiet --exit-code HEAD~1..HEAD ${path}"
return false
} catch (err) {
return true
}
}
if ( checkFolderForDiffs('api/') ) {
//API folder changed, run steps...
How to make shallow git submodules?
...@iveqy.com>
Acked-by: Jens Lehmann <Jens.Lehmann@web.de>
That means this works:
git submodule add --depth 1 -- repository path
git submodule update --depth -- [<path>...]
With:
--depth::
This option is valid for add and update commands.
Create a 'shallow' clone with a h...
How can I use numpy.correlate to do autocorrelation?
...stics we normalize auto-correlation into [-1,1].
partial v.s. non-partial mean/variance: when the timeseries shifts at a lag>0, their overlap size will always < original length. Do we use the mean and std of the original (non-partial), or always compute a new mean and std using the ever chang...