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Error handling principles for Node.js + Express.js applications?
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How can I change the color of my prompt in zsh (different from normal text)?
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Here's an example of how to set a red prompt:
PS1=$'\e[0;31m$ \e[0m'
The magic is the \e[0;31m (turn on red foreground) and \e[0m (turn off character attributes). These are called escape sequences. Different escape sequences give you different results, from absolute cursor positi...
What is the difference between libsqlite3.dylib and libsqlite3.0.dylib?
...s yet but one of the early steps from this tutorial is linking the SQLite3 framework. The tutorial calls for libsqlite3.0.dylib but I noticed another one libsqlite3.dylib. Is the latter just a symlink to the latest v3 library like the convention for package managers on UNIX or is there a differe...
Are parallel calls to send/recv on the same socket valid?
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How do I resize a Google Map with JavaScript after it has loaded?
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answered Apr 13 '09 at 7:36
SingleNegationEliminationSingleNegationElimination
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Counting the number of elements with the values of x in a vector
...an just use table():
> a <- table(numbers)
> a
numbers
4 5 23 34 43 54 56 65 67 324 435 453 456 567 657
2 1 2 2 1 1 2 1 2 1 3 1 1 1 1
Then you can subset it:
> a[names(a)==435]
435
3
Or convert it into a data.frame if you're more comfor...
@RequestParam in Spring MVC handling optional parameters
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MySQL Select Query - Get only first 10 characters of a value
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How to tell which colorscheme a Vim session currently uses
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