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Using the "apply" SKILL function

Curtisma

Hello:

I am trying to use the "apply" skill function to allow a function to take any number of format arguments and pass them to sprintf to form a string.  However if one of those format arguements happens to be a list, it tries to evaluate it and if it is just 2 numbers this fails. 

How do I keep it from evaluating the list contained within the @rest pfArgs list?

; Append a line to the file
; Args
; txt: The txt object created by using the new function (DPL)
; line: A string to append as a new line of the text.
; It can include printf style format specifiers (%s, etc)
; @rest: Arguements for the format specifiers in line
; Returns: The contents
procedure(appendLine(txt line @rest pfArgs)
txt->contents = tconc(txt->contents apply('sprintf nil line pfArgs))

Problem is when I try to use the function with a list as one of the pfArgs.
txt->appendLine(txt "%L" list(1 2))

Gives:
*** Error in routine eval:
Message: *Error* eval: not a function - 1

This is similar to the following:
apply('sprintf nil "%L" list(list(1 2)))
*** Error in routine eval:
Message: *Error* eval: not a function - 1

I have seen this old post wheich confirmed the problem, but didn't help solve it.
community.cadence.com/.../confused-about-the-apply-operation

  • The good news is that there's (nowadays) a lambda form of the sprintf function which is suitable for use with funcall or apply. This form doesn't have the first argument - it only returns the string rather than sets the variable in the first argument - but you weren't using that anyway (you had nil). So you'd simply do:

    txt->contents = tconc(txt->contents apply('lsprintf line pfArgs))

    That will fix your problem.

    Regards,

    Andrew.

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