[NTG-context] Re: interfaces.implement for key-value list

[NTG-context] Re: interfaces.implement for key-value list

[Henning Hraban Ramm]

Am 03.07.25 um 16:34 schrieb Wolfgang Schuster:
> Am 03.07.2025 um 16:04 schrieb Henning Hraban Ramm:
>> Hi,
>> I’m trying to get a simple function with a variable number of 
>> parameters working:
>>
>> """
>> \startluacode
>> interfaces.implement {
>>    name      = "Autoren",
>>    public    = true,
>>    arguments = { "hash" },
>>    actions   = function(t)
>>      logs.report('Autoren', 'interface got table of length ' .. #t)
>>    end
>> }
>> \stopluacode
>>
>> \starttext
>>
>> Info:
>> \Autoren[text=Hans,melody=Hraban]
>>
>> \stoptext
>> """
>>
>> The table t has always length 0. Where’s my error?
> 
> Do you see the difference?
> 
> \starttext
> 
> \startluacode
> 
> a = { "one", "two", "three" }
> 
> b = { x = "one", y = "two", z = "three" }
> 
> context("Table a: " .. #a)
> context.par()
> context("Table b: " .. #b)
> 
> \stopluacode
> 
> \stoptext
> 
> Wolfgang

Oops, yes: #count is not for string indices.

Thus I shouldn’t break if #t==0.

BTW is there a function for printing a table (like pprint.pprint in Python)?

The other problem was I had a return instead of context().

Thank you for the hint!

Hraban
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