[NTG-context] Merging two lua tables

BPJ bpj at melroch.se
Tue Aug 30 12:08:58 CEST 2022


Come to think of it you may also want to check that numeric indices are
indeed positive integers before appending their value. I usually don't
because their not being so is rare.

Den tis 30 aug. 2022 10:56BPJ <bpj at melroch.se> skrev:

>
>
> 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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