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Sorting multiple keys with Unix sort
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Ken GentleKen Gentle
12.9k11 gold badge3939 silver badges4949 bronze badges
7
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Paste multiple columns together
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# your starting data..
data <- data.frame('a' = 1:3, 'b' = c('a','b','c'), 'c' = c('d', 'e', 'f'), 'd' = c('g', 'h', 'i'))
# columns to paste together
cols <- c( 'b' , 'c' , 'd' )
# create a new column `x` with the three columns collapsed together
data$x <- apply( d...
How to convert hex to rgb using Java?
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return new Color(
Integer.valueOf( colorStr.substring( 1, 3 ), 16 ),
Integer.valueOf( colorStr.substring( 3, 5 ), 16 ),
Integer.valueOf( colorStr.substring( 5, 7 ), 16 ) );
}
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jQuery .data() does not work, but .attr() does
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213
I ran into a similar "bug" a few days ago when working with .data() and .attr('data-name') for H...
Build an ASCII chart of the most commonly used words in a given text [closed]
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123
votes
LabVIEW 51 nodes, 5 structures, 10 diagrams
Teaching the elephant to tap-dan...
Mathematical functions in Swift
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answered Jun 3 '14 at 10:25
Tomáš LinhartTomáš Linhart
10.4k44 gold badges4444 silver badges5151 bronze badges
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How do I run multiple background commands in bash in a single line?
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335
Exactly how do you want them to run? If you want them to be started in the background and run ...
Small Haskell program compiled with GHC into huge binary
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Let's see what's going on, try
$ du -hs A
13M A
$ file A
A: ELF 64-bit LSB executable, x86-64, version 1 (SYSV),
dynamically linked (uses shared libs), for GNU/Linux 2.6.27, not stripped
$ ldd A
linux-vdso.so.1 => (0x00007fff1b9ff000)
libXr...
MySQL foreign key constraints, cascade delete
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3 Answers
3
Active
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Is there a common Java utility to break a list into batches?
...e, partitioning a list containing [a, b, c, d, e] with a partition size of 3 yields [[a, b, c], [d, e]] -- an outer list containing two inner lists of three and two elements, all in the original order.
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