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Command to get nth line of STDOUT
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Jonathan LefflerJonathan Leffler
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Add new row to dataframe, at specific row-index, not appended?
...1:r, ], newrow, existingDF[-(1:r), ]) 801.161 831.7730 854.6320 881.6560 10641.417
Benchmarks
As @MatthewDowle always points out to me, benchmarks need to be examined for the scaling as the size of the problem increases. Here we go then:
benchmarkInsertionSolutions <- function(nrow=5,ncol=4)...
How would you do a “not in” query with LINQ?
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For people who start with a group of in-memory objects and are querying against a database, I'v...
How to add external library in IntelliJ IDEA?
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This answer is more neat. stackoverflow.com/questions/1051640/…
– 唐龍豹
Oct 18 '16 at 8:50
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Rake just one migration
... # => 0
This was for ruby 1.9.3p484 (2013-11-22 revision 43786) [x86_64-linux] and Rails 3.2.13.
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How do I find a stored procedure containing ?
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Be aware routine_definition is cropped at 4000 chars just in case you have a long procedure. Use OBJECTPROPERTY method instead.
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convert a JavaScript string variable to decimal/money
...integer type. It only has a Number type which are all stored internally as 64bit floating point numbers. Your point is valid for other languages that do have integer types such as C#, C++, but not really for JavaScript.
– Simon Brangwin
Feb 11 '15 at 4:06
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How is malloc() implemented internally? [duplicate]
...e sizes. For example, a malloc implementation could create buckets for 16, 64, 256 and 1024 byte structures. If you ask malloc to give you memory of a given size it rounds that number up to the next bucket size and then gives you an element from that bucket. If you need a bigger area malloc could us...
Installing rmagick on Ubuntu
...sudo apt-get install imagemagick libmagickwand-dev
sudo ln -s /usr/lib/x86_64-linux-gnu/ImageMagick-6.8.9/bin-Q16/Magick-config /usr/bin/Magick-config
gem install rmagick
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Why should hash functions use a prime number modulus?
...a safe assumption. But you can still get occasional bad hashing behaviours based on hash functions like the one above, and prime bucket count could help further.
Putting about the principle that "everything has to be prime" is as far as I know a sufficient but not a necessary condition for good dis...