How does TW differentiate numbers from text? Also Mathematics operator syntax.

[Brad DeBruler]

Pretty basic question, I believe... I have been trying to get some plugin macros to work, and the output is NaN, which I am guessing means "not a number".

The plugin macros work if a number is put in the macro call, but when I try to transclude a field it gives NaN. The macro is supposed to output the raw score and a bonus based on the raw score. It's a Dungeons & Dragons thing if you aren't familiar.

<<dnd.ability 16>>           Gives correct output:          16 (+3)

<<dnd.ability {{!!dnd.creature.str}}>>          Gives:  NaN (−NaN)

{{!!dnd.creature.str}}        Correctly transcludes the field value:    16

Is there the something line an INT function that must be used to say this is an integer and not a string?

Also, I was simply pasting in some of the mathematics operator examples and they do not evaluate the expression. There is obviously something else I am missing:

[[23]add[19]]    gives      23]add[19

Thanks! 

[Jeremy Ruston]

Hi Brad

Pretty basic question, I believe... I have been trying to get some plugin macros to work, and the output is NaN, which I am guessing means "not a number".

The plugin macros work if a number is put in the macro call, but when I try to transclude a field it gives NaN. The macro is supposed to output the raw score and a bonus based on the raw score. It's a Dungeons & Dragons thing if you aren't familiar.

<<dnd.ability 16>>           Gives correct output:          16 (+3)

<<dnd.ability {{!!dnd.creature.str}}>>          Gives:  NaN (−NaN)

{{!!dnd.creature.str}}        Correctly transcludes the field value:    16

Is there the something line an INT function that must be used to say this is an integer and not a string?

The macro call <<dnd.ability {{!!dnd.creature.str}}>> passes the literal string "{{!!dnd.creature.str}}” as the parameter to the macro, rather than evaluating it.

There’s a more flexible underlying syntax for calling macros where the parameters are evaluated before invocation:

<$macrocall $name="dnd.ability" paramName={{!!dnd.creature.str}}/>

Where “paramName” is the name of the parameter to your macro.

Also, I was simply pasting in some of the mathematics operator examples and they do not evaluate the expression. There is obviously something else I am missing:

[[23]add[19]]    gives      23]add[19

Pasting [[23]add[19]] is interpreted as a link to a tiddler titled “23]add[19” because filter expressions are only evaluated in certain contexts, notably triple curly braces. Try:

{{{ [[23]add[19]] }}}

Best wishes

Jeremy

Thanks! 

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