Someone asked me to quickly write them some code in any language that would accomplish a certain task. The following, which is in PostgreSQL, is the second solution that I came up with after doing the first one in my favorite language, JavaScript:

SELECT ARRAY_TO_STRING(ARRAY( SELECT CHR(num + CASE WHEN num < 26 THEN 65 WHEN num BETWEEN 26 AND 51 THEN 71 ELSE -4 END ) FROM ( SELECT FLOOR(RANDOM() * 62)::INT AS num, generate_series(1, 12) ) AS t ), '')

The question is, what does this `SELECT`

statement actually do? If you were asked to write that as a JavaScript, substituting the 12 for a variable passed into the function, what would your function look like?

~~As usual, the answer to this Problem of the Week will be made available a week from today, on Wednesday, August 22, 2012.~~

The answer to this Problem of the Week can now be found here.