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How to get the length of a list? [message #1784443]

Wed, 28 March 2018 05:58

Stephan Stahlmann

Messages: 1
Registered: March 2018

Junior Member

I have a small problem regarding getting the length of a list in RCPTT.

I have written a function which gets a list as a parameter. If I want to get th length of the list it returns 1, no matter how long the list actually is.

Example:
proc "my-func" [val list] {
show-alert [$list | length]
}
my-func [list "0" "1" "2" "3" "4" "5"] // returns 1
my-func [list "0" "1" "2" "3" "4"] // returns 1
my-func [list "0" "1" "2"] // returns 1

When i debugged, I found that $list is an EclList, which wraps java.util.List. so I thought I could get it via:

$list | get-object | invoke elements | invoke size

But it fails at "| get-object". So the question is, is there any way to get the length of list?

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Re: How to get the length of a list? [message #1791317 is a reply to message #1784443]

Thu, 28 June 2018 06:23

Viktoria Dlugopolskaya

Messages: 124
Registered: March 2017

Senior Member

Hi Stephan,

You have to correct your code to the following:
$list | invoke getElements | invoke size

'length' command counts objects from input pipe:
emit "0" "1" "2" "3" "4" "5" | length | eq 6 | assert-true
Documentation: https://hudson.eclipse.org/rcptt/job/rcptt-all/ws/releng/doc/target/doc/ecl/index.html#length

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