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Time complexity of Sieve of Eratosthenes algorithm
...risron What is the problem? It's not the case that "asymptotic complexity" and "amortized complexity" are two different kinds of the same thing. Amortization is just a technique for more carefully counting something, which can happen to be the asymptotic complexity.
– Shreevats...
Importing data from a JSON file into R
...fically, the file is an array of JSON objects with string fields, objects, and arrays. The RJSON Package isn't very clear on how to deal with this http://cran.r-project.org/web/packages/rjson/rjson.pdf .
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Is \d not supported by grep's basic expressions?
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grep's default mode is (iirc) POSIX regex, and \d is pcre. You can either pass -P to gnu grep, for perl-like regexps, or use [[:digit:]] instead of \d.
daenyth@Bragi ~ $ echo 1 | grep -P '\d'
1
daenyth@Bragi ~ $ echo 1 | grep '[[:digit:]]'
1
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How do you push a Git tag to a branch using a refspec?
...it objects. You need to “peel” the annotated tag back to commit object and push that instead.
git push production +1.0.0^{commit}:master
git push production +1.0.0~0:master # shorthand
There is another syntax that would also work in this case, but it means something slightly differen...
Java: Literal percent sign in printf statement
I'm trying to add an actual percent sign into a printf statement in Java and I'm getting the error:
3 Answers
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SQLite - increase value by a certain number
... a certain value in a table by a certain number without reading last value and afterwards updating it?
1 Answer
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How to alias 'git checkout' to 'git co'
I'd like the command git co to be the same as typing git checkout .
3 Answers
3
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Is there an AddRange equivalent for a HashSet in C#
...dicate the distinct way the HashSet works. You cannot safely Add a set of random elements to it like in Collections, some elements may naturally evaporate.
I think that UnionWith takes its name after "merging with another HashSet", however, there's an overload for IEnumerable<T> too.
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How do I capture bash output to the Mac OS X clipboard?
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The pbcopy command does this.
For example, this puts the output from ls on the clipboard/pasteboard:
ls | pbcopy
And pbpaste does the reverse, writing to stdout from the clipboard:
pbpaste > ls.txt
You can use both together to fil...
Java: possible to line break in a properties file?
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A backslash at the end of a line lets you break across multiple lines, and whitespace that starts a line is ignored:
myStr = Hello \
World
The Java docs put it this way:
A logical line holds all the data of a key-element pair, which may be spread out across several adjacent natura...