topic Are GDL arrays 0 indexed? in GDL

Are GDL arrays 0 indexed?

Jack D — Tue, 08 Nov 2022 22:52:27 GMT

I'm asking this since my supervisor is always starts array at 1.

DIM potato[]

   potato[1] = "russet"
   potato[2] = "yukon"
   potato[3] = "red lady"

To be honest, having 1 as the start of the index, kinda weirds me out but at the same time I'm also a bit curious if it is 0 indexed. Does this mean potato[0] does not exist or is potato[0] a none type?

Re: Are GDL arrays 0 indexed?

DGSketcher — Tue, 08 Nov 2022 23:09:39 GMT

In GDL, arrays are always indexed from [1] or a 2D array would be [1][1]. Your example of potato[0] should throw up an invalid index warning when you check your script.

Re: Are GDL arrays 0 indexed?

Jack D — Wed, 09 Nov 2022 00:54:42 GMT

ahh thanks! I've been looking for some mention if it's 0 index in the pdf guide but got nothing. Which got me thinking.

Re: Are GDL arrays 0 indexed?

Peter Baksa — Wed, 16 Nov 2022 15:31:57 GMT

Here are the details of using arrays: https://gdl.Graphisoft.com/reference-guide/expressions#DIM_gdlcommand