Re: for loop question

[Ray Andrews <rayandrews@eastlink.ca>]

On 11/03/2014 01:22 AM, Mikael Magnusson wrote:
> If you look up the section "Complex Commands" in the manpage, they're
> all listed fairly well explained. ...

Thanks.  You know, with so many documents available, it's hard to know 
what it worth
reading.  I wish there was a sort of recommended list of docs and web 
sites so that one
wouldn't waste so much time looking for things worth reading. I have 
Oliver's book
here, and at least I know it's approved.
> As to the for loop, it has two different forms. They're almost so
> different you could say the only thing they have in common is the word
> "for" :). One is
Just those three lines might save a fella hours of grief.  I intuitively 
expect them to be
related *and* to be related to the C form, which explains my head 
banging over:

     for ((i = 1; [ -n ${TLC[i] ]; i++))

... because in C one can always test for the return value of anything at 
all and it looks so
very much like C.

     for ((i=1; (z[$([ -n "$TLC[i]" ])0]),$? == 0; i++))

... is sick and twisted, but:

     for ((i = 1; $#TLC[i]; i++))

... is sweetly, intuitively best anyway.
> As a side note, if you ever want a do-while loop instead of a regular
> while loop, the trick is
> while just put the whole body;
>        of the loop here instead;
>        and the last command is;
>        the terminating condition; do done
Marvelous, I was wondering about that.

If I ever master zsh I'd like to write an essay: "Zsh culture for the 
sweet and innocent: Truths you hold to be self-evident that aren't true 
any more, or the weltanschauung of weltschmertz"