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How do I delete rows in a data frame?
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The key idea is you form a set of the rows you want to remove, and keep the complement of that set.
In R, the complement of a set is given by the '-' operator.
So, assuming the data.frame is called myData:
myData[-c(2, 4, 6), ] # notice the -
Of course, don't forget to "reassign" ...
What is the difference between “pom” type dependency with scope “import” and without “import”?
...n then reference these dependencies in the dependency section of your POM (and all of its child POMs) without having to include a version etc.
However if in your POM you simply define a normal dependency to other-pom-artifact-id then all dependencies from the dependency section of the other-pom-art...
API pagination best practices
I'd love some some help handling a strange edge case with a paginated API I'm building.
11 Answers
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Vim: Creating parent directories on save
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augroup BWCCreateDir
autocmd!
autocmd BufWritePre * if expand("<afile>")!~#'^\w\+:/' && !isdirectory(expand("%:h")) | execute "silent! !mkdir -p ".shellescape(expand('%:h'), 1) | redraw! | endif
augroup END
Note the conditions: expand("<afile>")!~#'^\w\+:/' wil...
How to create a trie in Python
I'm interested in tries and DAWGs (direct acyclic word graph) and I've been reading a lot about them but I don't understand what should the output trie or DAWG file look like.
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vertical align middle in
I want to keep the height of #abc div at 50px and text to align vertically in the middle of the div .
10 Answers
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Create SQL script that create database and tables
I have a SQL database and tables that I would like to replicate in another SQL Server. I would like to create a SQL script that creates the database and tables in a single script.
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Parse an HTML string with JS
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Create a dummy DOM element and add the string to it. Then, you can manipulate it like any DOM element.
var el = document.createElement( 'html' );
el.innerHTML = "<html><head><title>titleTest</title></head><body><...
How can I debug git/git-shell related problems?
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How and where to set this variables?
– Hunsu
Jan 15 '16 at 8:28
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logger configuration to log to file and print to stdout
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Just get a handle to the root logger and add the StreamHandler. The StreamHandler writes to stderr. Not sure if you really need stdout over stderr, but this is what I use when I setup the Python logger and I also add the FileHandler as w...