Hi,

I had some irritation with a "while"- loop, which turned out to be endless.
Anyway, i was able to find the problem and reduce it to be shown on the commandline:

I "typeset" (and initialize) an array and an integer variable:

Shell Scripting Syntax (Toggle Plain Text)

$ typeset -a arr; arr=(bourne again shell)
$ typeset -i ind=0

$ typeset -a arr; arr=(bourne again shell) $ typeset -i ind=0

Everything works as expected when doing:

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$ echo ${arr[((ind++))]}
bourne
$ echo ${arr[((ind++))]}
again
$ echo ${arr[((ind++))]}
shell

$ echo ${arr[((ind++))]} bourne $ echo ${arr[((ind++))]} again $ echo ${arr[((ind++))]} shell

But when i use the "echo" command in a pipe, (like

Shell Scripting Syntax (Toggle Plain Text)

$ typeset -i ind=0
$ echo ${arr[((ind++))]} | grep e
bourne

$ typeset -i ind=0 $ echo ${arr[((ind++))]} | grep e bourne

the postincrement of "ind" is not evaluated, so the next time i also get:

Shell Scripting Syntax (Toggle Plain Text)

$ echo ${arr[((ind++))]} | grep e
bourne
$ echo ${arr[((ind++))]} | grep e
bourne

$ echo ${arr[((ind++))]} | grep e bourne $ echo ${arr[((ind++))]} | grep e bourne

Well, this is not really a problem for i can do it in two lines, but i wonder, if it's possible to make it work in one line.

Anywone who can give a comment?

Thanks for reading and trying to help!
Bye,
Christoph