[NTG-context] Merging two lua tables

BPJ bpj at melroch.se
Tue Aug 30 10:56:19 CEST 2022


Den mån 29 aug. 2022 20:13Hans Hagen via ntg-context <ntg-context at ntg.nl>
skrev:

> On 8/29/2022 7:33 PM, BPJ via ntg-context wrote:
> > Hi,
> >
> > I use the attached Lua function to merge array, map and mixed tables
> alike
> > (but differently! :-) The trick is to check if each key is numeric or
> not,
> > append if it is and overwrite if it isn't.
>
> you really want something like this then:
>
> local  tab = table.pack(...)
> local  rv  = {}
>

Thanks. I was manually translating from MoonScript (https://moonscript.org)
where variables are local by default.


> > This function just ignores non-table arguments because that is what I
> > usually want. You may want to throw an error instead. Also it uses
> > table.pack. You might need to use `tab = {...}` and ipairs, or implement
> > pack:
> I might add table.himerged (hash and index) but slightly different (and
> some 30% faster) to util-tab but i think merging mixed hash/indexed
> tables is rare.
>
> Hans
>
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