J

since unknown year (earliest usage recorded on this site was 2007)

Users

2007

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2009

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quakehead

thaostra

dl - 18 years

quakehead - 1 years

thaostra - 15 years

2007–

(#~[:(0=>./)[:,/[:([:}.([:i.#)=[:|(]-"1{.))\.|:)(i.A.~[:i.!) 8

2009

Was jealous of extremely short solutions to ProjectEuler problems. Very compact indeed.

2010–

J is different, but in a totally awesome way that changes the way one thinks about programming.