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Extract a dplyr tbl column as a vector
...on to make pulling out a column a bit nicer (easier to type, and easier to read):
pull <- function(x,y) {x[,if(is.name(substitute(y))) deparse(substitute(y)) else y, drop = FALSE][[1]]}
This lets you do either of these:
iris2 %>% pull('Species')
iris2 %>% pull(Species)
iris2 %>% pull...
Can I obtain method parameter name using Java reflection?
...If the class was compiled with debugging it can extract the information by reading the bytecode of the class.
Another way is for it to inject a private static member into the bytecode of the class after it is compiled, but before it is placed in a jar. It then uses reflection to extract this inform...
What are the best Haskell libraries to operationalize a program? [closed]
... 100.0% of total user, 0.0% of total elapsed
You can get this in machine-readable format too:
$ ./A +RTS -t --machine-readable
[("bytes allocated", "64952")
,("num_GCs", "1")
,("average_bytes_used", "43784")
,("max_bytes_used", "43784")
,("num_byte_usage_samples", "1")
,("peak_megabytes_al...
When is memoization automatic in GHC Haskell?
... this case, the new version is much less efficient because it will have to read about 1 GB from memory where y is stored, while the original version would run in constant space and fit in the processor's cache. In fact, under GHC 6.12.1, the function f is almost twice as fast when compiled without ...
What is the maximum value for an int32?
... If you get the tattoo on your face, don't forget to reverse it so it reads correctly in the mirror. Otherwise you'll see 746,384,741,2 which is wrong and would be embarrassing.
– Larry S
Apr 21 '16 at 20:20
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JavaScript implementation of Gzip [closed]
...ok me some time but i found that in the JSXGraph library there is a way to read gzipped data.
Here is where I found the library: http://jsxgraph.uni-bayreuth.de/wp/2009/09/29/jsxcompressor-zlib-compressed-javascript-code/
There is even a standalone utility that can do that, JSXCompressor, and the c...
How do I kill all the processes in Mysql “show processlist”?
...mysql -u -p -e "show processlist;" | grep Sleep | awk '{print $1}' | while read LINE; do mysql -u -p -e "kill $LINE"; done
– user3770797
Nov 4 '17 at 20:55
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How to drop a database with Mongoose?
...creation script in Node.js and Mongoose.
How can I check if the database already exists, and if so, drop (delete) it using Mongoose?
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Visual Studio 2013 IntelliSense stops working for ASP.NET MVC5 Controllers
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Thanks, this worked for me too. If you read to the bottom try this before you remove all your extensions.
– Just another Steve
Jun 9 '14 at 20:17
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How to exit an if clause
... @ephemient: That's funny, is there more to the story? I'd like to read the whole thing.
– Roman
Jan 15 '10 at 5:51
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