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How to find out which package version is loaded in R?
I am in a process of figuring out how to use my university cluster. It has 2 versions of R installed. System wide R 2.11 (Debian 6.0) and R 2.14.2 in non-standard location.
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Count all occurrences of a string in lots of files with grep
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cat * | grep -c string
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Get a pixel from HTML Canvas?
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There's a section about pixel manipulation in the W3C documentation.
Here's an example on how t...
Time complexity of Euclid's Algorithm
..., which makes the analysis easier. You can divide it into cases:
Tiny A: 2a <= b
Tiny B: 2b <= a
Small A: 2a > b but a < b
Small B: 2b > a but b < a
Equal: a == b
Now we'll show that every single case decreases the total a+b by at least a quarter:
Tiny A: b % (a % b) < a a...
Java 8: Where is TriFunction (and kin) in java.util.function? Or what is the alternative?
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x := 1. So if you like to see what the functions return for y := 1, y := 2, y := 3 you
have to write f(1,1) , f(1,2) , f(1,3).
In Java 8, constructive functions should be handled (most of the time) by using method references because there's not much advantage of using a constructive lambda funct...
How do I clone a specific Git branch? [duplicate]
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edited Jul 26 '19 at 21:43
David Riott
1555 bronze badges
answered Dec 15 '09 at 23:09
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C pointer to array/array of pointers disambiguation
...Mehrdad AfshariMehrdad Afshari
379k8383 gold badges822822 silver badges775775 bronze badges
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How to check if array element exists or not in javascript?
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answered Oct 28 '12 at 9:58
techfoobartechfoobar
58.9k1212 gold badges101101 silver badges123123 bronze badges
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What is tail call optimization?
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772
Tail-call optimization is where you are able to avoid allocating a new stack frame for a functio...
How do I keep track of pip-installed packages in an Anaconda (Conda) environment?
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conda-env now does this automatically (if pip was installed with conda).
You can see how this ...