blog

Abuse me more, I like it.

Par jd le jeudi, mars 3 2005, 14:57 - Life - Lien permanent

How to choose when you don't know ? Ask zsh !

% S=(work cleanupmyflat) ; echo ${S[$(($RANDOM % ${#S[*]} + 1))]}
cleanupmyflat

Oh my god...

Update: for bash users:
% S=(work cleanupmyflat) ; echo ${S[$(($RANDOM % ${#S[*]}))]}

1. Le jeudi, mars 3 2005, 16:26 par Nico

But the "+1" at the end makes it display either "cleanupmyflat" or nothing. Without the "+1" it seems to work. Or was that an intended behavior?

Nico.

2. Le jeudi, mars 3 2005, 16:30 par Julien Danjou

No, at least with my zsh it works: $RANDOM % 2 return 0 or 1 but array index begins at 1 so you have to add 1

3. Le jeudi, mars 3 2005, 17:03 par Justin

python -c 'import random ; s=("work", "cleanupmyflat") ; print random.choice(s)'

4. Le jeudi, mars 3 2005, 17:05 par MadCoder

And for both (bash and zsh) :

S=(work cleanupmyflat work) ; echo ${S[$(($RANDOM % $((${#S[*]} - 1)) + 1))]}

5. Le jeudi, mars 3 2005, 19:55 par Piem

... cat /dev/urandom > /dev/dsp

and if still unsure, you can organise a poll:

S=(work cleanupmyflat) ; for i in `seq 1000`; do echo ${S[$(($RANDOM % ${#S[*]}))]}; done | sort | uniq -c | sort -rn

6. Le vendredi, mars 4 2005, 22:12 par Jon Åslund

It didn't give the result I wanted, so here is a (bash) patch:

S=(work cleanupmyflat) ; echo ${S$(($RANDOM % ${#S[*}))]}"? nah, I don't think so"